CN213043081U - Connection row and connection structure that layer upon layer welding formed - Google Patents

Abstract

The utility model discloses a connector bar and connection structure that stitch welding formed. The connecting row is prepared by sequentially laminating a plurality of foils with equal length and same thickness according to the length sequence, respectively welding two ends into a plate body serving as an end welding part by pressure welding at the two ends after the two ends are aligned, and then trimming and deburring. The foil is aluminum foil or copper foil. The connecting row is naturally bent between the end welding parts at the two ends to form a bending part due to the difference of the lengths of the foils, and therefore, the plate bodies of the end welding parts at the two ends are in a V-shaped structure. When the connecting row is used for electric connection, the end welding part of the V-shaped structure is usually pressed into a U shape, so that the outward elastic tension of the connecting row is obtained. Compared with a structure formed by directly bending a metal plate body, the connecting row has better elastic performance.

Description

Connection row and connection structure that layer upon layer welding formed

Technical Field

The utility model relates to a run-on, especially have buffer function's elastic connection row.

Background

The connection row for connecting the batteries in series or in parallel in the battery pack is usually realized by an aluminum row or a copper row. If the battery poles of the two batteries are oppositely butted, and the connection row is required to have the elastic connection row with the buffering function, the connection row can be bent into a V shape, and the connection row is U-shaped during connection, so that the buffering between the two batteries can be realized by utilizing the elasticity constructed by the metal toughness of the connection row. However, for the aluminum connection row, the aluminum itself has poor toughness and high ductility, so that the aluminum row with the V-shaped structure has poor elastic performance.

Disclosure of Invention

The utility model discloses the problem that will solve: the elastic performance of the V-shaped connecting row is enhanced.

In order to solve the above problem, the utility model discloses a scheme as follows:

according to the utility model discloses a splice bar that lap welding formed, this splice bar include that both ends are not welded and because of foil length's difference and the nature bending forms the flexion between tip weld part and the both ends tip weld part of the plate body by a plurality of foil pressure welding, and make both ends from this be the V font structure between the plate body of tip weld part.

Further, according to the utility model discloses a connector bar that range upon range of welding formed, both ends tip weld part symmetry each other, both ends interior angle R between the tip weld part plate body is 15~60 degrees.

Further, according to the utility model discloses a connector bar that range upon range of welding formed, foil thickness is 0.05~0.5mm, the plate body thickness H of tip weld part is 0.5~5 mm.

Further, according to the connecting row formed by stacking welding of the utility model, the plate body length of the end welding part is L1; the length of the outside of the bent portion is L2; l2 is 1-5 times of L1.

Furthermore, according to the connecting bar formed by the stacked welding of the utility model, the connecting bar is made of a plurality of foils with the same length and the same thickness and in an arithmetic sequence; the length difference between two adjacent and tightly-attached foils is 2.0-2.8 times of the thickness of the foils.

Further, according to the utility model discloses a connector bar that range upon range of welding formed, the tip weld part is still through cutting edge and burring processing after the pressure welding, makes the corner of tip weld part is equipped with the chamfer.

Further, according to the utility model discloses a connector bar that range upon range of welding formed, the pressure welding adopts the polymer diffusion welding, or adopts ultrasonic bonding, or adopts the mode that ultrasonic bonding and laser welding combined together.

Further, according to the utility model discloses a range upon range of row that welds formed, the foil is aluminium foil or copper foil.

Further, according to the utility model discloses a connector bar that range upon range of welding formed still includes the centre and makes the centre weld become the plate body as middle weld part through the pressure welding, the flexion quilt middle weld part falls into the part of two symmetries.

According to the utility model, the connecting structure comprises two butt-jointed bodies and the connecting row formed by the laminated welding, wherein the two butt-jointed bodies are arranged oppositely and are respectively connected with the end welding part of the connecting row in a welding way to the outer side of the end welding part; the two butt joint bodies respectively press and hold the end welding parts to enable the connecting row to be in a U shape.

The technical effects of the utility model are as follows: compare in the V font connector bar of directly bending into by the metal plate body, make by the same material the utility model discloses a connector bar has bigger elastic performance.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of a connection row of the present invention.

Fig. 2 is a schematic structural diagram of an embodiment of the connection structure of the present invention.

Fig. 3 is a schematic side view of another embodiment of a connection row according to the present invention.

Wherein,

11 is an end welding part, 111 is a chamfer, 12 is a bending part, 13 is a middle welding part, and 19 is a foil;

2 is a butt-joint body;

r is an internal angle between the end welding parts of the two ends;

h is the plate thickness of the end welding part;

l1 is the length of the end weld;

l2 is the length of the outside of the bend;

arrow F is the direction of the link row spring force.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1

As shown in fig. 1, a connector bank is formed by stacking and welding foils. Specifically, the connection row includes end welding portions 11 whose two ends are formed by press-welding a plurality of foils 19 into a plate body, and bending portions 12 which are not welded between the end welding portions 11 at the two ends and are naturally bent due to the length difference of the foils 19, and thus the plate bodies of the end welding portions 11 at the two ends are in a V-shaped structure. The connection row can be prepared by two methods:

the first method is that after the foils 19 with the same or different lengths are stacked, the middle of the foils is bent to form an inner angle R of 15-60 degrees, then the foils are subjected to pressure welding at two ends to form a plate body, and then the plates are cut into the shape shown in the figure 1 through the forming treatment such as edge cutting and deburring. At this time, the lengths of the foil pieces 19 between the both end portion welded portions 11 are different from each other by bending before pressure welding.

In the second method, the connecting row is formed by sequentially and closely laminating a plurality of strip-shaped foils 19 with different lengths according to the length order, aligning the two ends of the foils, and then respectively welding the two ends of the foils. After the pressure welding is completed, the end portion welding portion 11 is further subjected to forming processes such as trimming and deburring.

The pressure welding of both ends causes both ends to be welded into a plate body, which is an end-weld 11. Wherein, the foil 19 is preferably an aluminum foil or a copper foil with a thickness of 0.05-0.5 mm. The number of foils is usually from 5 to 50. The plate thickness H of the welded end portion 11 is 0.5 to 5 mm. Due to the difference in length of the foils 19 and the alignment of the two ends, the unwelded portion of the connection row between the end welds 11 at the two ends is naturally bent to form the bent portion 12, and thus the V-shaped structure is formed between the plate bodies of the end welds 11 at the two ends. The end welding parts 11 at the two ends are symmetrical to each other, and the inner angle R between the plate bodies of the end welding parts 11 at the two ends is 15-60 degrees. The length L2 of the outer side of the bent portion 12 is 1 to 5 times the plate length L1 of the end welding portion 11.

Further, the lengths of the foils 19 welded by the connecting row are in an arithmetic progression and the thicknesses are the same. In this case, those skilled in the art understand that the angle of the internal angle R between the end weld 11 plates at both ends depends on the length difference between the foils 19 and the thickness of the foils 19 themselves. When the inner angle R between the plates is 15 to 60 degrees at the end welding portions 11 at both ends and the foils 19 are tightly adhered and curved in an arc shape in the curved portion 12, it can be calculated that the difference in length between the two adjacent foils 19 is Pi 2/3 to Pi 11/12 times the thickness of the foil 19 itself. Where Pi is the circumference ratio. In this embodiment, the length difference between two adjacent and closely adhered foils 19 is 2.0 to 2.8 times, preferably 2.4 times, the thickness of the foil 19 itself.

Further, the pressure welding of both ends is preferably performed by polymer diffusion welding, or by ultrasonic welding, or by a combination of ultrasonic welding and laser welding.

Further, the edge of the end weld 11 is cut out with a chamfer 111.

The connection bank of the present embodiment is used for electrical connection, particularly when a buffer function is required for electrical connection between two oppositely disposed components. Fig. 2 illustrates a connection structure comprising the above-described connection row and two oppositely arranged docking bodies 2. Both of the butt-joint bodies 2 are metallic conductors. For example, the two docking bodies 2 are battery posts of two batteries, respectively, and when the battery posts of the two batteries need to be connected in series, the battery posts of the two batteries can be connected by using the connection bars. When the two butt-jointed bodies 2 are connected by the connection row, the two butt-jointed bodies 2 are connected to the outer sides of the end welding portions 11, respectively. At this time, the two butt pieces 2 are pressed against the end welding portions 11 respectively so that the connection row is formed in a U shape. At this time, the foil pieces 19 of the bent portion 12 are subjected to different tensions, so that the end portions of the welded portions 11 at both ends are outwardly sprung to resist the pressing force of the two abutting bodies 2, and the directions of arrows F in fig. 2 are referred to. I.e. when the connecting row acts as a spring. The butt piece 2 is usually welded to the end weld 11.

Example 2

The two oppositely arranged abutment bodies 2 are usually required not to be too far apart in the connection structure of embodiment 1, since this also involves the problem of the radius of curvature when the curved portion 12 of the connection row is bent. When the two abutting bodies 2 are spaced apart from each other, the radius of curvature of the curved portion 12 is required to be large, and when the radius of curvature is large, the large radius of curvature of the curved portion 12 is likely to be pressed into a curve having a small radius of curvature, so that the tension of the end portion welded portions 11 at both ends expanding outward is insufficient. For this reason, the present embodiment provides a connection row in another embodiment, and referring to fig. 3, the connection row further includes a plate body whose middle is welded by pressure welding to be a middle welding 13 on the basis of embodiment 1, and the bent portion 12 is divided into two symmetrical portions by the middle welding portion 13. That is, in the present embodiment, there are two bent portions 12, and the two bent portions 12 are symmetrical to each other.

Claims (10)

1. The connecting row formed by overlapped welding is characterized by comprising end welding parts (11) of which two ends are formed by pressing and welding a plurality of foils (19) into plate bodies, and bending parts (12) which are not welded between the end welding parts (11) of the two ends and are naturally bent due to different lengths of the foils (19), and therefore the plate bodies of the end welding parts (11) of the two ends are in a V-shaped structure.

2. The laminate-welded connector row according to claim 1, wherein the end-welding portions (11) at both ends are symmetrical to each other, and an inner angle R between plates of the end-welding portions (11) at both ends is 15 to 60 degrees.

3. The laminate-welded busbar according to claim 1, wherein the foil (19) has a thickness of 0.05 to 0.5mm, and the end-welded portion (11) has a plate thickness H of 0.5 to 5 mm.

4. The laminate-welded coupling bar according to claim 1, wherein the length of the plate body of the end weld (11) is L1; the length of the outside of the bent portion (12) is L2; l2 is 1-5 times of L1.

5. Lap welded row according to claim 1, characterised in that it is made of foils (19) of the same thickness; the length difference between two adjacent and closely adhered foils (19) is 2.0-2.8 times of the thickness of the foils (19).

6. The stack-welded row according to claim 1, characterised in that the end welds (11) are also trimmed and deburred after pressure welding, so that the corners of the end welds (11) are provided with chamfers (111).

7. A stack-welded connector according to claim 1, wherein the pressure welding is polymer diffusion welding, ultrasonic welding, or a combination of ultrasonic welding and laser welding.

8. Lap welded connector bank according to claim 1, characterized in that the foil (19) is an aluminium foil or a copper foil.

9. The stack-welded coupling bar according to claim 1, further comprising a plate body which is intermediately welded by pressure welding to form an intermediate welded portion (13), the bent portion (12) being divided into two symmetrical portions by the intermediate welded portion (13).

10. A connection structure, comprising two butt-joined bodies (2) and a connection row which is formed by stack welding according to any one of claims 1 to 9, wherein the two butt-joined bodies (2) are arranged oppositely and are respectively connected with the end welding parts (11) of the connection row in a welding way at the outer sides of the end welding parts (11); the two butt joint bodies (2) respectively press the end welding parts (11) to enable the connecting row to be U-shaped.

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