Integrated busbar assembly and buckle-type acquisition terminal thereof

Abstract

The utility model provides an integrated busbar assembly and a buckle-type acquisition terminal thereof, and belongs to the technical field of power batteries. The buckle type acquisition terminal comprises a welding part, a wiring part and a positioning part, the wiring part and the positioning part are respectively connected with the welding part, the welding part is used for being welded with a busbar, and the wiring part is used for fixing an acquisition wire harness; the positioning part comprises a supporting part connected with the welding part and two V-shaped bending buckles symmetrically connected to the two sides of the supporting part, and the two V-shaped bending buckles are jointly buckled into positioning holes in the busbar so that the collection terminal can be pre-fixed to the busbar. The buckle of the acquisition terminal has larger elastic bending space and distance, tolerance redundancy can be formed, so that the requirement for the machining tolerance of the positioning hole and the positioning part is reduced, the buckle can be easily pressed down into the positioning hole and does not easily fall off from the positioning hole, and the good fixing effect between the acquisition terminal and the busbar can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power batteries, in particular to an integrated busbar assembly and a buckle type collection terminal thereof. BACKGROUND

[0002] The CCS device (Cells Contact System) usually adopts two basic structures for product manufacturing, one is to adopt an insulating film, and the collection circuit is integrally packaged by hot pressing; the other is to adopt an insulating plate, and a structure cavity is pre-set, a mounting column is arranged in the cavity, the busbar is arranged in the cavity, and then a fixed pin is hot riveted out of the mounting column by hot riveting to fix the busbar. Based on the hot pressing process, the collection signal part of the CCS device can adopt PCBA and FPC; and based on the insulating plate hot riveting process, the signal collection part of the CCS device can adopt wire harness collection, FFC (Flexible Flat Cable) collection and FDC collection in addition to PCBA and FPC. Therefore, the CCS device based on the insulating plate hot riveting process has a more flexible application mode.

[0003] Compared with the FPC collection mode, the wire harness collection mode of the CCS device has greater current carrying capacity, and the processing and manufacturing of the wire harness do not require additional SMT processing equipment, and it can realize the function of active balancing, further optimizing the application layer of the battery. Therefore, the wire harness collection CCS device has the indispensable technical characteristics in the market.

[0004] However, due to the particularity of the wire harness (no fixed arrangement structure and certain elastic stress), the wire harness collection mode cannot well fix the collection terminal at the welding position of the busbar, or a relatively complex and inefficient manual pre-fixing mode is required to fix the collection terminal. In order to not use the manual pre-fixing mode, a wire harness collection terminal is pre-fixed on the busbar, and a current solution is to design a wire harness collection terminal with a buckle. The structure of the wire harness collection terminal based on the buckle pre-fixing is shown as the collection terminal 01 shown in Figure 1 The head end of the welding part is designed with a U-shaped buckle 011, the U-shaped buckle 011 is buckled into the buckle hole 021 on the busbar 02 to pre-fix the collection terminal 01 on the busbar 02, the fixed mounting hole 022 on the busbar 02 is sleeved on the fixed column 03 on the insulating plate, and the busbar 02 is fixed on the insulating plate by the hot riveting of the fixed column 03. The structure size of the U-shaped buckle 011 and the buckle hole 021 has a tolerance, and sometimes the U-shaped buckle 011 is difficult to press into the buckle hole 021, resulting in a welding gap, and sometimes the buckle hole 021 is too large and pops out after being put into the buckle hole 021, so that the pre-fixing effect of the collection terminal 01 cannot be formed. The utility model discloses a kind of integrated busbar assemblies and buckle type collection terminals with good fixing effect.

[0005] To solve the existing technical problems, the application provides an integrated busbar assembly with good fixing effect and a buckle type collection terminal.

[0006] According to a first aspect of the embodiments of the application, a buckle type collection terminal is provided, which is applied to an integrated busbar assembly. The collection terminal includes a welding portion, a wiring portion, and a positioning portion connected to the welding portion, respectively. The welding portion is used for welding with a busbar. The wiring portion is used for fixing a collection wire harness.

[0007] The positioning portion includes a support portion connected to the welding portion and two V-shaped bent buckles symmetrically connected to both sides of the support portion. The two V-shaped bent buckles are jointly buckled into a positioning hole on the busbar to pre-fix the collection terminal on the busbar.

[0008] Optionally, the V-shaped bent buckle includes a first bent portion and a second bent portion. The first bent portion is bent by a first angle from the support portion towards the busbar. The second bent portion is bent by a second angle from an end of the first bent portion away from the support portion towards away from the busbar.

[0009] When the V-shaped bent buckle is buckled into the positioning hole, the second bent portion is buckled on the side wall of the positioning hole.

[0010] Optionally, the support portion and the wiring portion are respectively located on both sides of the welding portion in the length direction.

[0011] The support portion and the welding portion extend in the same plane, and the width of the support portion is less than that of the welding portion.

[0012] Optionally, the support portion is located in the middle of one side of the welding portion. The two V-shaped bent buckles are symmetrically arranged on both sides of the support portion in the width direction.

[0013] Optionally, the side of the support portion away from the welding portion protrudes relative to the V-shaped bent buckle.

[0014] Optionally, the welding portion, the positioning portion, and the wiring portion are integrally stamped and formed.

[0015] Optionally, the tail edge of the welding portion is aligned with the edge of the busbar. The buckle type collection terminal further includes an edge bent portion.

[0016] The edge bent portion is bent from the tail edge and extends a first preset distance along the edge of the busbar to fix the collection terminal on the busbar in cooperation with the positioning portion.

[0017] Optionally, the edge bending part is located in the middle of the tail edge, and the extension end of the edge bending part is connected with the wiring part.

[0018] Optionally, the wiring part is connected with the middle of the tail edge, and the number of the edge bending parts is multiple, and the multiple edge bending parts are symmetrically arranged on both sides of the wiring part.

[0019] According to a second aspect of the embodiments of the present application, an integrated busbar assembly is provided, comprising a busbar and the collection terminal of any one of the above.

[0020] The busbar is provided with a positioning hole opposite to the positioning part, and the collection terminal is pre-fixed on the busbar in a manner that the positioning part is buckled into the positioning hole.

[0021] As can be seen from the above, the collection terminal of the first embodiment of the present application is buckled, the positioning part is designed to consist of a supporting part and two V-shaped bending buckles symmetrically arranged about the supporting part, thereby forming a W-shaped bending buckle opening into the positioning hole, the W-shaped bending buckle has a larger elastic bending space and distance than the existing U-shaped buckle, can form a tolerance redundancy, and reduces the requirement for the machining tolerance of the positioning hole and the positioning part. The W-shaped bending buckle is designed with a hook, which is easy to press into the positioning hole and not easy to fall off from the positioning hole, and can achieve good fixing effect between the collection terminal and the busbar. In addition, compared with the U-shaped buckle, the W-shaped bending buckle can effectively reduce the connection area of the welding area of the positioning part and the busbar, further reduce the correlation sensitivity of the buckle part of the positioning part and the welding area, and improve the yield of the integrated busbar assembly laser welding. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings are only used to show the embodiments and are not considered as limiting the present application. Moreover, the same reference signs are used to represent the same parts throughout the drawings. In the drawings:

[0023] Figure 1 It is a structural schematic diagram of the existing wiring harness collection terminal based on buckle pre-fixing;

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the collection terminal of the first embodiment of the present application;

[0025] Figure 3 It is a side view structural schematic diagram of the collection terminal of the first embodiment of the present application along the width direction;

[0026] Figure 4 It is a side view of the collection terminal of the first embodiment of the present application along the length direction;

[0027] Figure 5 An exploded structural schematic view of an integrated busbar assembly comprising the collection terminal according to the first embodiment of the present application is provided;

[0028] Figure 6 A three-dimensional structural schematic view of an integrated busbar assembly comprising the collection terminal according to the first embodiment of the present application is provided;

[0029] Figure 7 A structural schematic view of the collection terminal fixed on the busbar based on the first edge bending part according to the second embodiment of the present application is provided;

[0030] Figure 8 A structural schematic view of the collection terminal fixed on the busbar based on the second edge bending part according to the third embodiment of the present application is provided. DETAILED DESCRIPTION

[0031] The present application will be described in more detail by referring to the attached drawings. In each of the drawings, like elements are designated by like reference numerals. Each portion in the drawings is not drawn to scale for the sake of clarity. In addition, certain well-known components are not shown. For the sake of brevity, a semiconductor structure obtained after a number of steps can be described in one drawing.

[0032] The terms "first", "second", etc. in the description of the embodiments of the present application and the claims and the drawings are used only for the purpose of distinguishing between similar elements, and cannot be understood as indicating or implying relative importance. The terms "comprise" and "have" and any variations thereof are intended to cover not exclusively containing, for example, containing a series of steps or units.

[0033] Figure 2 A three-dimensional structural schematic view of the snap-type collection terminal according to the first embodiment of the present application is provided, Figure 3 A side structural schematic view of the snap-type collection terminal according to the first embodiment of the present application as viewed in the width direction is provided, Figure 4 A side view of the collection terminal according to the first embodiment of the present application as viewed in the length direction is provided, Figure 5 An exploded structural schematic view of an integrated busbar assembly comprising the collection terminal according to the first embodiment of the present application is provided, Figure 6 A three-dimensional structural schematic view of an integrated busbar assembly comprising the collection terminal according to the first embodiment of the present application is provided. The specific structure of the collection terminal according to the first embodiment of the present application will be described in detail below. Figures 2 to 6 A three-dimensional structural schematic view of an integrated busbar assembly comprising the collection terminal according to the first embodiment of the present application is provided. The specific structure of the collection terminal according to the first embodiment of the present application will be described in detail below.

[0034] Please refer to Figures 2 to 6As shown, the collecting terminal 1 provided by the first embodiment of the present application is applied to an integrated busbar assembly, which comprises a welding portion 11, and a wiring portion 12 and a positioning portion 13 connected with the welding portion 11 respectively. The welding portion 11 is used for welding with a busbar 2, and the wiring portion 12 is used for fixing a collecting wire harness. The positioning portion 13 comprises a supporting portion 131 connected with the welding portion 11 and two V-shaped bent buckles 132 symmetrically connected on both sides of the supporting portion 131, and the two V-shaped bent buckles 132 are jointly buckled into a positioning hole 21 on the busbar 2 to pre-fix the collecting terminal 1 on the busbar 2. Wherein, the supporting portion 131 and the two V-shaped bent buckles 132 constitute a W-shaped buckle, and the W-shaped buckle is buckled into the positioning hole 21 to pre-fix the collecting terminal 1 on the busbar 2.

[0035] It should be noted that, in the present application, the V-shaped and W-shaped refer to the shape of the cross section of the buckle in the width direction. The length direction refers to the x-axis direction in the formula (1), i.e. the arrangement direction of the welding portion 11 and the wiring portion 12, and the width direction refers to the y-axis direction in the formula (1), i.e. the direction perpendicular to the x-axis and coplanar. Figure 2 Figure 2 The positioning hole 21 is not limited to be a square hole, and the top surface of the busbar 2 extends to the bottom surface, i.e. penetrates the busbar 2 in the thickness direction. In the present application, the thickness direction refers to the direction perpendicular to the length direction and the width direction and not coplanar.

[0036] When the integrated busbar assembly is applied to a battery cell connecting system, the collecting wire harness fixed on the wiring portion 12 can be but is not limited to a voltage collecting wire harness for collecting the voltage of the battery. The collecting terminal 1 is used for fixing the collecting wire harness on the busbar 2 and connecting with the busbar 2. In the first embodiment, the collecting terminal 1 can be but is not limited to a terminal formed by stamping a nickel sheet, and the busbar 2 can be but is not limited to a copper-aluminum bar. That is, in some embodiments, the welding portion 11, the positioning portion 13 and the wiring portion 12 of the collecting terminal 1 are integrally formed by stamping.

[0037] The buckle type collecting terminal 1 provided by the first embodiment of the present application designs the buckle structure of the positioning portion 13 to be composed of the supporting portion 131 and the two V-shaped bent buckles 132 symmetrically connected with the supporting portion 131, and the formed W-shaped buckle is buckled into the positioning hole 21. The W-shaped buckle has a larger elastic bending space and distance compared with the existing U-shaped buckle, and can form a tolerance redundancy to reduce the requirement for the processing tolerance of the positioning hole 21 and the positioning portion 13. Due to the hook design, the W-shaped buckle is easy to be pressed into the positioning hole 21 and not easy to fall off from the positioning hole 21, and can realize a good fixing effect between the collecting terminal 1 and the busbar 2. In addition, compared with the U-shaped buckle, the W-shaped buckle can effectively reduce the connection area of the welding area of the positioning portion 13 and the busbar 2, further reduce the correlation sensitivity of the buckle part of the positioning portion 13 and the welding area, and improve the yield of the laser welding of the integrated busbar assembly.​

[0038] Please continue to see Figures 2 to 6 As shown in the drawings, each V-shaped bending buckle 132 includes a first bending part 1321 and a second bending part 1322, the first bending part 1321 is bent by a first angle a from the support part 131 to the direction close to the busbar 2, and the second bending part 1322 is bent by a second angle b from the end of the first bending part 1321 away from the support part 131 to the direction away from the busbar 2. When the V-shaped bending buckle 132 is buckled into the positioning hole, the second bending part 1322 is buckled on the side wall of the positioning hole 21, so as to well pre-fix the collection terminal 1 on the busbar 2, and the second bending part 1322 and the first bending part 1321 constitute a V-shaped bending buckle with elastic function, effectively providing elastic space between the buckle and the positioning hole 21, and buckling into the positioning hole 21.

[0039] In some embodiments, the extension lengths of the first bending part 1321 and the second bending part 1322 are the same, and the corresponding bending angles are the same, that is, the first angle a is equal to the second angle b. In other embodiments, the extension lengths of the first bending part 1321 and the second bending part 1322 can be different, and the corresponding bending angles can also be different.

[0040] Further, in the first embodiment, the support part 131 and the wiring part 12 are located on the two sides of the welding part 11 in the length direction respectively, the support part 131 extends in the same plane as the welding part 11, and the width is smaller than that of the welding part, so as to reduce the influence of the positioning part 13 on the reduction of the welding area.

[0041] As an optional implementation, in the first embodiment, the support part 131 is specifically located at the middle of one side of the welding part, and the two V-shaped bending buckles 132 are symmetrically arranged on the two sides of the support part 131 in the width direction, so as to increase the fixing stability between the positioning part 13 and the positioning hole 21.

[0042] As an optional implementation, in the first embodiment, the side of the support part 131 away from the welding part 11 protrudes relative to the V-shaped bending buckle 132, so as to prevent the W-shaped bending buckle from completely collapsing below the positioning hole 21, causing the welding part 11 to warp, and further to expand the welding area space.

[0043] The collection terminal 1 provided by the first embodiment of the present application effectively reduces the pressable area of the mouth and can effectively avoid forming a protrusion on the welding plane of the collection terminal 1, thereby affecting the downward pressing of the welding mouth, effectively improving the welding yield, and compared with the corresponding U-shaped buckle collection terminal, has a shorter raw material cutting length, can reduce the width of the raw material strip, and then reduce the material cost.

[0044] The welding portion 11 is in a sheet structure, which facilitates a large-area contact with the surface of the busbar 2, so that the collection terminal 1 is firmly welded to the busbar 2, thereby reducing the problem of peeling of the welding portion 11 from the busbar 2. The wiring portion 12 is used to fix the collection harness connection, so as to realize the electrical connection and fixation between the collection terminal 1 and the collection harness, thereby solving the problem of disconnection. The collection harness is used to connect an external sampling device, so as to transmit the sampling information of the battery to the sampling device.

[0045] The wiring portion 12 includes a base body 120 connected with the welding portion 11 and a connecting piece 121 connected with the base body 120 and used to connect the collection. After the collection harness is inserted into the through slot 122 of the connecting piece 121, the connecting piece 121 firmly clamps the collection harness 2 by being extruded, and the connecting piece 121 is engaged with the collection harness, so as to realize the fixed connection between the connecting piece 121 and the collection harness. Specifically, the connecting piece 121 is an open ring with a buckle, and the connecting piece 121 is extruded to make the connecting piece 121 clamp the collection harness. As another embodiment, the connecting piece 121 can also be in a closed tubular structure.

[0046] Please continue to refer to Figure 2 and Figure 3 In the first embodiment, the collection terminal 1 provided by the application further includes a tail clearance bending portion 14, which is bent away from the busbar 2 at the tail edge of the welding portion 11, and the welding portion 11 is connected with the wiring portion 12 through the tail clearance bending portion 14. By arranging the tail clearance bending portion 14 at the tail edge of the welding portion 11, the problem of the collection terminal 1 being lifted to form a welding gap due to the interference caused by the crimping of the wiring portion 12 to the harness can be reduced, so that the process yield of the integrated busbar assembly can be improved.

[0047] In some embodiments, the tail edge of the welding portion 11 of the collection terminal 1 is aligned with the edge of the busbar 2, and the collection terminal 1 further includes an edge bending portion. The edge bending portion is bent from the tail edge and extends a preset distance along the edge of the busbar, so as to be fixed on the busbar 2 in cooperation with the positioning portion 13. By cooperating with the buckle fixation of the positioning portion, the fixation effect of the collection terminal 1 on the busbar 2 can be further improved.

[0048] Figure 7 The collection terminal 1 provided by the second embodiment of the application is fixed on the busbar 2 based on the structure of the first edge bending portion 15. Please refer to Figure 7As shown in the second embodiment, the connecting portion 12 is connected to the middle of the edge of the tail edge of the welding portion 11, and the edge bending portion includes at least one first edge bending portion 15, which is symmetrically arranged on both sides of the connecting portion 12 to increase the effect of the first edge bending portion 15 on stabilizing the collection terminal 1. In other embodiments, the number of the first edge bending portion 15 can also be other numbers, and the plurality of first edge bending portions can be, but are not limited to, symmetrically arranged on both sides of the connecting portion 12.

[0049] Figure 8 The structure schematic diagram of the collection terminal 1 provided according to the third embodiment of the present application is fixed on the busbar 2 based on the second edge bending portion 16. In the third embodiment, the edge bending portion includes the second edge bending portion 16, which is bent from the middle of the tail edge of the welding portion 11 to the direction close to the busbar 2, and extends a second preset distance along the edge of the welding portion 11 and the busbar 2. The extension end of the second edge bending portion 16 extending along the edge of the busbar 2 is connected to the connecting portion 12. The second preset distance is greater than the thickness of the welding portion 11 and less than the sum of the thicknesses of the welding portion 11 and the busbar 2, so that the second edge bending portion 16 can cooperate with the positioning portion 13 to well fix the collection terminal 1 on the busbar 2.

[0050] In addition, the present application also provides an integrated busbar assembly as shown in Figure 5 and Figure 6 The integrated busbar assembly includes the buckle type collection terminal 1 and the busbar 2 provided in any one of the embodiments of the present application, and the busbar 2 is provided with a positioning hole 21 corresponding to the positioning portion 13. The buckle type collection terminal 1 is pre-fixed on the busbar 2 in a manner that the positioning portion 13 is buckled into the positioning hole 21. The integrated busbar assembly provided in the embodiments of the present application can achieve the same technical effects as the collection terminal 1 provided in the embodiments of the present application, and will not be repeated here.

[0051] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A snap-on acquisition terminal, applied to integrated busbar assemblies, characterized in that, The collecting terminal comprises a welding part, a wiring part and a positioning part, the welding part is used for welding with the busbar, and the wiring part is used for fixing the collecting harness; The positioning part comprises a supporting part connected with the welding part and two V-shaped bending buckles symmetrically connected on both sides of the supporting part, and the two V-shaped bending buckles are jointly buckled into the positioning hole on the busbar to pre-fix the collecting terminal on the busbar.

2. The collection terminal of claim 1, wherein, The V-shaped bending buckle comprises a first bending part and a second bending part, the first bending part is bent by a first angle from the supporting part to the direction close to the busbar, and the second bending part is bent by a second angle from one end of the first bending part away from the supporting part to the direction away from the busbar. When the V-shaped bending buckle is buckled into the positioning hole, the second bending part is buckled on the side wall of the positioning hole.

3. The collection terminal of claim 1, wherein, The supporting part and the wiring part are respectively located on both sides of the welding part in the length direction. The supporting part and the welding part extend in the same plane, and the width of the supporting part is smaller than that of the welding part.

4. The collection terminal of claim 3, wherein, The supporting part is located in the middle of one side of the welding part, and the two V-shaped bending buckles are symmetrically arranged on both sides of the supporting part in the width direction.

5. The snap-on collection terminal of claim 1, wherein, The side of the supporting part away from the welding part protrudes relative to the V-shaped bending buckle.

6. The collection terminal of claim 1, wherein, The welding part, the positioning part and the wiring part are integrally stamped and formed.

7. The collection terminal of claim 1, wherein, The tail edge of the welding part is aligned with the edge of the busbar, and the collecting terminal further comprises an edge bending part. The edge bending part is bent from the tail edge and extends by a first preset distance along the busbar edge to cooperate with the positioning part to fix the buckle type collecting terminal on the busbar.

8. The collection terminal of claim 7, wherein, The edge bending part is located in the middle of the tail edge, and the extension termination end of the edge bending part extending along the busbar edge is connected with the wiring part.

9. The collection terminal of claim 7, wherein, The wiring part is connected with the middle of the tail edge, and the number of the edge bending parts is multiple, and the multiple edge bending parts are symmetrically arranged on both sides of the wiring part.

10. An integrated busbar assembly, characterized by, The collecting terminal comprises a welding part, a wiring part and a positioning part, the welding part is used for welding with the busbar, and the wiring part is used for fixing the collecting harness; The busbar is provided with a positioning hole opposite to the positioning part, and the collecting terminal is pre-fixed on the busbar in the manner that the positioning part is buckled into the positioning hole.

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