KR20220048752A - Electrical connecting apparatus for battery cell - Google Patents

Abstract

The present invention relates to an electrical connecting apparatus for a battery cell. A frame (10) may form a framework, and a busbar mounting portion (12), which has a busbar (30) mounted thereon, may be formed on the frame (10). The busbar mounting portion (12) has an elastic hook (24) that can be elastically deformed, locking ribs (18) may be positioned on both sides of the busbar mounting portion (120), which correspond to both side edges of the busbar (30), and the locking ribs (18) having locking jaws (22) for locking the edges of the busbar (30) while passing through a passing portion (36) disposed on both side edges of the busbar (30). According to the present invention, it is possible to easily attach and detach the busbar to and from the frame.

Description

Electrical connecting apparatus for battery cell

The present invention relates to an electrical connection device for a battery cell.

Batteries used in electric vehicles are made in the form of a battery pack. The battery pack includes a plurality of battery modules, and the battery module includes a plurality of unit battery cells. In this way, the battery for the electric vehicle is made in order to obtain sufficient power for driving and to safely use the battery cell.

In configuring the battery module, it is necessary to electrically connect a plurality of battery cells, and for this purpose, an electrical connection device for battery cells is used. In a battery module, a plurality of battery cells are generally connected in series to make a desired voltage. To this end, the electrodes of the battery cells are connected using a bus bar, and these bus bars are coupled to the electrodes of the battery cell while installed on the frame of the electrical connection device.

A plurality of the bus bars are used and are installed to be coupled to the frame. These busbars were installed on the frame through ultrasonic welding. However, when ultrasonic welding is used, there is a problem in that it is difficult to recycle the electrical connection device.

In order to enable recycling of parts constituting the electrical connection device, the bus bar must be detachably installed on the frame. However, in order to make the bus bar detachable from the frame, it is necessary to utilize a mechanical structure capable of interference fit. However, there is a problem in that the mechanical structure is damaged in the process of mounting and detaching the bus bar to the frame.

Republic of Korea Patent Publication No. 10-2015-0031864 Republic of Korea Patent Publication No. 10-2014-0144945

An object of the present invention is to detachably install a bus bar to a frame in an electrical connection device for a battery cell.

An object of the present invention is to minimize the flow of the bus bar to the frame while detachably mounting the bus bar to the frame in an electrical connection device for a battery cell.

In the present invention for achieving the above object, the bus bar may be coupled to the bus bar seating portion by using elastic deformation and restoration of the elastic hook. Accordingly, the operation of mounting the bus bar to the bus bar seating portion can be easily performed.

In addition, in the present invention, since one side of the bus bar is hung using an elastic hook and both sides of the bus bar are fixed by hooking them with hanging ribs, the bus bar can be firmly fixed to the frame during transport and assembly work.

The present invention may include a frame on which a bus bar seating part is formed on a surface, and a bus bar that is seated on the bus bar seating part and coupled with electrodes of a battery cell, wherein the bus bar seating part is elastically deformable and the An elastic hook to hang on one side may be formed, and a hanging rib for positioning the bus bar in the bus bar seating part by hooking both sides of the bus bar may be formed in the bus bar seating part.

The elastic hook may include a connecting leg that is formed across the through portion formed in the bus bar seating portion and is elastically deformable, and a hook protrusion that is formed on the connecting leg and hangs on the bus bar.

The connecting leg may have an arcuate shape protruding in a direction orthogonal to the width direction of the bus bar.

The hanging rib may include a rib body upright on the bus bar seating portion and a hooking jaw protruding orthogonally to the rib body and having one side of the bus bar positioned between the bus bar seating portion and the rib body.

A hanging hole through which the elastic hook is hung may be formed in the bus bar, and a passage portion through which the hanging rib passes may be formed in the bus bar.

The passing portion may be formed at both edges of the bus bar.

The present invention relates to a frame in which a bus bar seating part having elastically deformable elastic hooks and at least one pair of hanging ribs is formed on the surface, and the bus bar seating part is mounted to the bus bar seating part by the elastic hooks and hanging ribs and is coupled to an electrode of a battery cell. It may include a bus bar, and elastically deforming the elastic hook in a state in which one side of the bus bar is hung on the elastic hook, so that the hanging rib passes through a passage formed in the bus bar, and the bus bar can be seated in the bus bar seating part, , while the elastic hook is restored, the bus bar may move on the bus bar seating portion so that the hanging ribs may hang both ends of the bus bar.

The elastic hook may include a connecting leg that is formed across the through portion formed in the bus bar seating portion and is elastically deformable, and a hook protrusion that is formed on the connecting leg and hangs on the bus bar.

The hanging rib may include a rib body upright on the bus bar seating portion and a hooking jaw protruding orthogonally to the rib body and having one side of the bus bar positioned between the bus bar seating portion and the rib body.

The bus bar may include a body piece having a hanging hole through which the elastic hook is hung, and an electrode coupling piece extending side by side from both ends of the body piece and to which an electrode of a battery cell is coupled.

A board connection part extending from any one of the electrode coupling pieces to be signal-connected to the printed circuit board may be further provided.

Passing portions through which the hooking jaws of the hooking ribs pass may be formed at both ends of the main body piece or at the edge of the electrode coupling piece.

The electrical connection device for a battery cell according to the present invention may have at least one of the following effects.

First, in the present invention, the bus bar is positioned between the hanging ribs for hanging both sides of the bus bar and the bottom surface of the frame, and an elastic hook hangs one end of the bus bar to fix it. In particular, the elastic hook is formed integrally with the frame and can be elastically deformed to a certain extent, so that the bus bar can be detachably fixed to the frame. Since the bus bar is mounted and detached from the frame while the elastic hook is elastically deformed, the operation of attaching and detaching the bus bar to the frame becomes very easy.

In addition, in the present invention, while the elastic hook is restored to its original state in a state in which the bus bar is mounted on the frame, it is possible to prevent the bus bar from flowing in the longitudinal direction by hanging the bus bar. In addition, since the hook ribs for fixing both sides of the bus bar pass through the bus bar passage and hang the edge of the bus bar, the bus bar can be stably positioned on the bus bar seat during transport or in the process of coupling to the battery cell.

1 is a partial plan view showing a preferred embodiment of an electrical connection device for a battery cell according to the present invention.
Figure 2 is a partial exploded perspective view of an embodiment of the present invention.
3 is a partial perspective view of a frame constituting an embodiment of the present invention;
4 is a perspective view of a bus bar constituting an embodiment of the present invention;
5 is a working state diagram showing that the bus bar is rotated by hanging on the elastic hook of the frame in the embodiment of the present invention.
6 is a working state diagram showing a process in which the hanging rib of the frame passes through the passing part of the bus bar in the embodiment of the present invention.
Figure 7 is an assembly state diagram showing a state in which the bus bar is assembled to the frame in the embodiment of the present invention.
Figure 8 is a plan view showing the state of Figure 5;
Fig. 9 is a plan view showing the state of Fig. 6;

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, or order of the elements are not limited by the terms. When it is described that a component is "connected", "coupled" or "connected" to another component, the component may be directly connected or connected to the other component, but another component is between each component. It will be understood that may also be "connected", "coupled" or "connected".

Hereinafter, a configuration of an electrical connection device for a battery cell according to an embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1 , the electrical connection device for a battery may include a frame 20 serving as a skeleton and a bus bar 30 installed on the frame 10 . Various components may be further installed on the bus bar 30 in the frame 10 . For example, there may be a printed circuit board.

The frame 10 may be made of an insulating material. The frame 10 may be made of an insulating synthetic resin material. A bus bar seating part 12 may be formed on the frame 10 . In the drawings of this embodiment, the entire frame 10 is not shown. Only a small portion of the frame 10 is shown. The bus bar seating part 12 is also not shown in its entirety, but only a part. 1 shows two bus bar seating units 12 .

The bus bar seating portion 12 may be partitioned from the surroundings by a partition wall 14 . The partition wall 14 may be formed to protrude by a predetermined height from one surface of the frame 10 . The partition wall 14 may be formed along a position corresponding to the edge of the bus bar 30 .

A coupling window 16 may be provided in the bus bar seating portion 12 partitioned by the partition wall 14 . At least one coupling window 16 may be formed on one bus bar seating part 12 . A through hole 17 may be formed to pass through the frame 10 at a position between the coupling windows 16 . The through hole 17 may be a passage for discharging heat generated in the battery cell to the outside.

Hanging ribs 18 may be provided on both sides of the bus bar seating portion 12 in the width direction. There may be at least two or more of the hanging ribs 18 . The hanging ribs 18 may be paired with the bus bar seating part 12 . Alternatively, the hanging ribs 18 may be at positions that do not correspond to each other on both sides of the bus bar 30 in the width direction.

The hanging rib 18 may be composed of a rib body 20 standing upright from the surface of the frame 10 and a hooking jaw 22 protruding orthogonally to the upper side of the rib body 20 . The hooking jaw 22 may extend in a direction opposite to the hooking jaw 22 of the corresponding opposite hooking rib 18 . The edge of the bus bar 30 may be positioned between the hooking jaw 22 and the surface of the bus bar seating part 12 .

An elastic hook 24 may be provided at one side of the bus bar seating part 12 . The elastic hook 24 may have a predetermined elastic deformation. The elastic hook 24 may be located in the through part 25 formed in the bus bar seating part 12 . The through portion 25 may be formed to pass through the frame 10 from one side of the bus bar seating portion 12 . The through portion 25 may have a predetermined width and may be formed to extend long in the width direction of the bus bar seating portion 12 .

A connection leg 26 may be formed in the through portion 25 to extend along the extending direction of the through portion 25 . The connecting leg 26 may have a substantially arcuate shape when viewed from a plan view. When the connecting leg 26 has an arcuate shape, the highest portion of the arcuate shape may protrude in a direction orthogonal to the width direction of the bus bar seat 12 . In FIG. 3 , the most protruding portion of the connecting leg 26 may be directed toward one edge of the frame 10 . The connecting leg 26 may be positioned within the through portion 25 and may not protrude beyond the surface of the bus seating portion 12 .

A hook projection 28 may protrude from the connecting leg 26 . The upper end of the hook protrusion 28 may protrude in the same direction as the protruding portion from the arch of the connecting leg 26 . The hook protrusion 28 may be configured to protrude in the same direction as the portion protruding from the arch in an upright state to protrude upward from the connecting leg 26 . The hook projection 28 may be hung on the hook hole 33 of the bus bar 30 .

The bus bar 30 may be made of a conductive material. The bus bar 30 may be made of a conductive metal material. The bus bar 30 may be made by processing a metal plate. The bus bar 30 may have a body piece 32 that is seated in the area of the bus bar seating portion 12 where the elastic hook 24 is located. The body piece 32 has a substantially rectangular plate shape, and a hook hole 33 may be formed at the edge of the middle part. The hook protrusion 28 of the elastic hook 24 may pass through the hook hole 33 to be hung.

There may be electrode coupling pieces 34 and 34 ′ extending side by side from both ends of the body piece 32 . The electrode coupling pieces 34 and 34 ′ may be positioned on the coupling window 16 . Most of the electrode coupling pieces 34 and 34 ′ may be located on the coupling window 16 . An electrode of a battery cell may be coupled to the electrode coupling pieces 34 and 34 ′ through the coupling window 16 .

There may be passing portions 36 at the edges of the electrode coupling pieces 34 and 34 ′ or at both edges in the width direction of the main body piece 32 . The passage portion 36 is a portion through which the hook rib 18 passes while the bus bar 30 is seated on the bus bar seating portion 12 . In the illustrated embodiment, the passing parts 36 are formed on both edges of the bus bar 30 in the width direction, but may be formed at various positions of the bus bar 30 otherwise. The passing portion 36 may be formed through the inner side of the main body piece 32 or the electrode coupling pieces 34 and 34' instead of being formed on the edge of the bus bar 30 . In this case, a configuration capable of preventing interference between the rib body 20 of the hanging rib 18 and the bus bar 30 may be formed by being connected to the passage part 36 .

There may be a substrate connection part 38 extending from the one electrode coupling piece 34 . The substrate connection part 38 may be integrally formed with the electrode coupling piece 34 and further extend. Signal connection with the printed circuit board on the frame 10 may be achieved through the board connection part 38 .

Hereinafter, the assembly and use of the electrical connection device for a battery cell according to the present invention having the configuration as described above will be described in detail.

In the present invention, the bus bar 30 is seated and coupled to each of the bus bar seating parts 12 of the frame 10 will be described with reference to FIGS. 5 to 7 .

As can be seen in FIG. 5 , the hook projection 28 of the elastic hook 24 in the bus bar seating part 12 is hung on the hook hole 33 of the bus bar 30 . At this time, the bus bar 30 is positioned obliquely with respect to the surface of the bus bar seating part 12 , and the part on which the hanging hole 33 is formed is adjacent to the surface of the bus bar seating part 12 . (33) to hang the hook projection (28).

In this state, the bus bar 30 is moved by the operator in the direction of arrow A in FIG. 4 . The elastic hook 24 may be elastically deformed by the movement of the bus bar 30 . That is, the connecting leg 36 may be elastically deformed while moving in the arrow A direction.

In a state in which the bus bar 30 is moved in the direction of the arrow A so that the elastic hook 24 is elastically deformed, the bus bar 30 is rotated to be positioned on the bus bar seating portion 12 and the coupling window 16 . make it possible This state is shown in FIG. 6 .

While the bus bar 30 is rotated to be positioned on the bus bar seating part 12 and the coupling window 16 , the hanging rib 18 passes through the passing part 36 . If the bus bar 30 is rotated in a direction in which the bus bar 30 is seated on the bus bar seating part 12 and the coupling window 16 while the elastic hook 24 is not elastically deformed in the direction of the arrow A, the hanging rib (18) may be hung at a position adjacent to the passage portion (36) without passing through the passage (36).

In the state shown in FIG. 6 , the elastic hook 24 is elastically deformed, and the hooking jaw 22 of the hooking rib 18 is positioned in the passage part 36 of the bus bar 30 . At this time, when the force of the operator holding the bus bar 30 is removed, the elastic hook 24 is restored to its original state and the bus bar 30 can be moved in the direction of the arrow B indicated in FIG. 6 . .

As the elastic hook 24 is restored to its original state, the hook protrusion 28 moves in the direction of the arrow B within the through portion 25 to move the bus bar 30 . As the bus bar 30 is moved, the hook 22 of the hook rib 18 in the passing part 36 is on the surface of the bus bar 30 corresponding to the edge of the passing part 36 . will be located Such a state is shown in FIG. 7 . In FIG. 2, the same state as in FIG. 7 is shown in a plan view.

As shown in FIG. 7 , the bus bar 30 is mounted on the bus bar seating part 12 . In this state, the bus bar 30 from falling out from the bus bar seating portion 12 upwards can be prevented by the hook protrusion 28 and the hook 22 of the hook rib 18 . Of course, it is possible to move as much as the gap between the hook projection 28 and the hook hole 33 in the direction of arrow B of FIG. 6 or the opposite direction. However, when the electrode of the battery cell is coupled to the electrode coupling piece 34 of the bus bar 30 , the bus bar 30 is not arbitrarily separated from the frame 10 .

As described above, when the bus bars 30 are respectively mounted on the bus bar seating portions 12 of the frame 10, and the electrodes of the battery cells are coupled to the electrode coupling pieces 34 of these bus bars 30, the battery cells They may be connected in parallel to make an electrical connection, for example. A printed circuit board may be connected to the board connection part 38 of the bus bar 30 to transmit a necessary signal.

In the above, even though it has been described that all components constituting the embodiment according to the present invention operate in combination or combined into one, the present invention is not necessarily limited to this embodiment. That is, within the scope of the object of the present invention, all the components may operate by selectively combining one or more. In addition, terms such as "comprises", "comprises" or "have" described above mean that the corresponding component may be inherent, unless otherwise specified, excluding other components. Rather, it should be construed as being able to further include other components. All terms, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs, unless otherwise defined. Terms commonly used, such as those defined in the dictionary, should be interpreted as being consistent with the contextual meaning of the related art, and are not interpreted in an ideal or excessively formal meaning unless explicitly defined in the present invention.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10: Frame 12: Bus bar seating part
14: partition wall 16: combination window
17: through hole 18: hook rib
20: rib body 22: hook jaw
24: elastic hook 25: through part
26: connecting leg 28: hook turn
30: bus bar 32: main body
33: hook hole 34, 34': electrode coupling piece
36: passing part 38: board connection part

Claims (12)

A frame in which the bus bar seating part is formed on the surface,
and a bus bar seated on the bus bar seating part and coupled to an electrode of a battery cell,
An elastic hook that is elastically deformable and hangs on one side of the bus bar is formed in the bus bar seating part, and hanging ribs for positioning the bus bar in the bus bar seating part by hooking both sides of the bus bar are formed in the bus bar seating part. Electrical connection device for battery cells.
The battery cell according to claim 1, wherein the elastic hook includes a connecting leg that is formed across a through portion formed in the bus bar seating portion and is elastically deformable, and a hook protrusion formed on the connecting leg and hooked on the bus bar. electrical connection.
The electrical connecting device for a battery cell according to claim 2, wherein the connecting leg has an arcuate shape protruding in a direction orthogonal to a width direction of the bus bar.
According to claim 1, wherein the hanging rib comprises a rib body upright in the bus bar seating portion and a hook protruding orthogonal to the rib body, one side of the bus bar is positioned between the bus bar seating portion and Electrical connection device for battery cells.
[Claim 5] The electrical connection device for battery cells according to any one of claims 1 to 4, wherein the bus bar is provided with a hanging hole through which the elastic hook is hung, and the bus bar is provided with a passage through which the hook rib passes.
[Claim 6] The electrical connection device for a battery cell according to claim 5, wherein the passing portion is formed at both edges of the bus bar.
A frame in which a bus bar seating portion having an elastically deformable elastic hook and at least one pair of hanging ribs is formed on the surface;
and a bus bar mounted on the bus bar seating part by the elastic hook and the hanging rib and coupled to the electrode of the battery cell,
In a state in which one side of the bus bar is hung on the elastic hook, the elastic hook is elastically deformed so that the hanging rib passes through a passage formed in the bus bar and the bus bar is seated on the bus bar seating portion, and the bus bar is restored while the elastic hook is restored. An electrical connection device for a battery cell in which the bar moves on the bus bar seating portion and the hanging ribs hang both ends of the bus bar.
The battery cell according to claim 7, wherein the elastic hook includes a connecting leg that is formed across a through portion formed in the bus bar seating part and is elastically deformable, and a hook protrusion formed on the connecting leg and hooked on the bus bar. electrical connection.
8. The method of claim 7, wherein the hanging rib includes a rib body upright on the bus bar seating portion and a hooking jaw protruding orthogonally to the rib body and having one side of the bus bar positioned between the bus bar seating portion and the rib body. Electrical connection device for battery cells.
10. The method according to any one of claims 7 to 9, wherein the bus bar comprises a body piece having a hanging hole through which the elastic hook is hung, and an electrode coupling piece extending side by side from both ends of the body piece and to which the electrode of the battery cell is coupled. Electrical connection device for battery cells, including.
The electrical connection device for a battery cell according to claim 10, further comprising a board connection part extending from any one of the electrode coupling pieces to be signal-connected to the printed circuit board.
The electrical connection device for a battery cell according to claim 10, wherein a passage portion through which the hooking jaw of the hooking rib passes is formed at both ends of the main body piece or at an edge of the electrode coupling piece.

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