Integrated bus connecting bar

Abstract

The utility model relates to an integrated bus connecting bar, and relates to the technical field of integrated busbars, the integrated bus connecting bar comprises a substrate and a plurality of aluminum bars fixedly arranged on the substrate, a flexible circuit board is arranged on the side face, facing the aluminum bars, of the substrate, and a combination hub and a plurality of conductive connecting pieces are fixedly arranged on the flexible circuit board. The end part, far away from the flexible circuit board, of the conductive connecting sheet is connected with the aluminum bar; an insulating film for coating the flexible circuit board and the aluminum bar is fixedly arranged on the side surface of the substrate; the substrate is provided with a plurality of first positioning holes, the flexible circuit board is provided with second positioning holes coinciding with the first positioning holes, and the insulating film is provided with third positioning holes coinciding with the second positioning holes. In the application, when the insulating film is fixed on the side surface of the substrate through hot pressing, the positioning fixture on the hot pressing equipment can limit the substrate, the flexible circuit board and the insulating film through the first positioning hole, the second positioning hole and the third positioning hole, so that the possibility of dislocation of the substrate, the flexible circuit board and the insulating film when the insulating film is fixed through hot pressing is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of integrated busbars, and in particular to an integrated busbar connecting bar. Background Art

[0002] With the rapid development of the new energy vehicle industry, power batteries, as the core components of new energy vehicles, are also constantly improving their technology. In order to improve the integration, safety, lightweight and automation of battery packs, CCS (Cells Contact System, integrated busbar or wiring harness board integration) has been widely used as a key connection component inside the battery pack. The CCS integrated busbar not only realizes the high-voltage series and parallel connection of the battery cells, but is also responsible for the temperature sampling and battery cell voltage sampling of the battery, and transmits this information to the battery management system (BMS), which is an important part of the BMS system.

[0003] In the related art, an integrated busbar includes a substrate, a plurality of aluminum bars welded on the substrate, a flexible circuit board located on one side of the substrate, wherein the flexible circuit board is provided with a plurality of conductive copper sheets electrically connected to the flexible circuit board, and then an insulating plastic film is fixed on the substrate so that the flexible circuit board and the aluminum bars are located between the substrate and the plastic insulating film, and a connection socket electrically connected to the flexible circuit board is fixed on the substrate;

[0004] The battery management system is electrically connected to the connection socket through external terminals, and uses aluminum bars to connect multiple battery cells in series or in parallel to achieve high voltage and large power output to meet the driving needs of electric vehicles; the battery management system then monitors and manages the battery based on this information to ensure safe and efficient operation of the battery.

[0005] However, in the assembly and fixation of insulating plastic films, although the traditional glue bonding method is widely used, there are potential challenges. Even if the components are accurately aligned during the initial assembly, during subsequent use, due to factors such as thermal stress changes and mechanical vibrations, the edges of the substrate and the flexible circuit board may be slightly displaced, thereby affecting the fixing effect of the insulating plastic film. This deviation may cause the relative positions of the flexible circuit board, substrate and insulating film to shift, ultimately affecting the overall performance and long-term reliability of the integrated busbar, and there is room for improvement. Utility Model Content

[0006] The purpose of the present application is to provide an integrated busbar connection bar to solve the problem in the above-mentioned related art that the insulating plastic film may deviate or be misaligned during the installation process, which may ultimately affect the overall performance and long-term reliability of the integrated busbar.

[0007] The integrated busbar connection bar provided in this application adopts the following technical solution:

[0008] An integrated busbar connection bar comprises a substrate and a plurality of aluminum bars fixed on the substrate, a flexible circuit board is provided on the side of the substrate facing the aluminum bars, a connection socket and a plurality of conductive connecting pieces are fixed on the flexible circuit board, the ends of the conductive connecting pieces away from the flexible circuit board are connected to the aluminum bars, an insulating film for covering the flexible circuit board and the aluminum bars is fixed on the side of the substrate; a plurality of first positioning holes are provided on the substrate, a second positioning hole overlapping with the first positioning hole is provided on the flexible circuit board, and a third positioning hole overlapping with the second positioning hole is provided on the insulating film.

[0009] By adopting the above technical solution, when the insulating film is fixed on the side of the substrate by hot pressing, due to the coaxial opening of the first positioning hole, the second positioning hole and the third positioning hole, the positioning fixture on the hot pressing equipment can limit the substrate, the flexible circuit board and the insulating film through the first positioning hole, the second positioning hole and the third positioning hole, thereby reducing the possibility of misalignment of the three when the insulating film is fixed by hot pressing.

[0010] Optionally, the conductive connecting piece includes a fuse portion and connecting portions fixedly arranged on both side edges of the fuse portion, and the two connecting portions are fixedly connected to the flexible circuit board and the aluminum bar respectively.

[0011] By adopting the above technical solution, due to the coordinated arrangement of the fuse part and the connecting part, in which the fuse part is a structure similar to a fuse, when a short circuit occurs in the line connected to the busbar connecting bar, it can be quickly fused and then cut off the circuit to avoid causing greater impact, thereby improving the safety performance of the busbar connecting bar when used.

[0012] Optionally, the socket is arranged at one end edge of the flexible circuit board, and the socket is also fixed on the substrate; a plurality of conductive parts are fixed on the side of the flexible circuit board away from the substrate, a plurality of pins are fixed on the socket, and a bending part abutting against the conductive part is fixed at one end of the pins.

[0013] By adopting the above technical solution, due to the relative arrangement of the bent portion and the conductive portion, when the socket is installed, the bent portion on the socket abuts against the conductive portion on the flexible circuit board, thereby achieving electrical connection between the socket and the flexible circuit board.

[0014] Optionally, a fixing plug is fixedly provided on the side of the socket facing the flexible circuit board, a first fixing hole for the fixing plug to pass through is provided on the flexible circuit board, and a second fixing hole for the fixing plug to be embedded is provided on the base plate.

[0015] By adopting the above technical solution, due to the setting of the fixing plug, when the socket is installed, the fixing plug is inserted into the first fixing hole and then embedded into the corresponding second fixing hole, so that the socket and the substrate can be quickly fixed, thereby improving the corresponding assembly efficiency.

[0016] Optionally, the fixed plug includes a locking portion and an insertion portion fixed on one side of the locking portion, and a plurality of positioning blocks are provided on the side of the insertion portion away from the locking portion; a fixed through groove for the insertion portion to pass through is provided on the connector, and a fixed recessed groove for the locking portion to be embedded and fixed is provided on an opening edge of the fixed through groove away from the flexible circuit board, and the positioning block is used to penetrate the first fixing hole and then be embedded in the second fixing hole.

[0017] By adopting the above technical solution, during the assembly process of the fixed plug and the socket, the insertion part is first passed through the fixed through groove, and then the locking part is embedded and fixed to the inside of the fixed recessed groove, and finally the positioning plug protrudes from the outer side of the socket, which is convenient for the subsequent fixing of the positioning plug on the substrate.

[0018] Optionally, a positioning block is fixedly provided on the outer surface of the positioning plug, a side edge of the positioning block away from the insertion portion is provided with a guiding slope, and a positioning groove for the positioning block to be embedded is opened on the inner wall of the second fixing hole.

[0019] By adopting the above technical solution, due to the setting of the positioning block and the guiding slope, the positioning block can be inserted into the second fixing hole along the guiding slope, and then force is applied to make the positioning block snap into the positioning slot, thereby improving the assembly stability of the positioning block and the substrate, and also improving the installation stability of the socket.

[0020] Optionally, a plurality of locking teeth are fixedly provided on the outer side surface of the locking portion, and the locking teeth are used to interfere with the inner wall of the fixed sink.

[0021] By adopting the above technical solution, when the locking part is inserted into the fixed recessed groove, the locking teeth are in interference fit with the inner wall of the fixed recessed groove, thereby achieving installation and fixation of the locking part.

[0022] Optionally, a clearance gap is formed at an opening edge of the locking portion away from the insertion portion, and a clamping protrusion is fixedly provided on the bottom side of the clearance gap.

[0023] By adopting the above technical solution, when the assembly of the conductive connecting piece and the socket is skewed or misaligned, the staff can clamp the clamping protrusion with the help of tools, and then apply force to separate and remove the conductive connecting piece from the socket.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. Since the first positioning hole, the second positioning hole and the third positioning hole are coaxially opened, when the insulating film is fixed on the side of the substrate by hot pressing, the positioning fixture on the hot pressing equipment can limit the substrate, the flexible circuit board and the insulating film through the first positioning hole, the second positioning hole and the third positioning hole, thereby reducing the possibility of misalignment of the three when the insulating film is fixed by hot pressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0028] Figure 2 is a schematic diagram of the explosion structure of an embodiment of the present application;

[0029] Figure 3 It is a partial cross-sectional structural schematic diagram of the installation and coordination of the substrate, the flexible circuit board and the insulating film in the embodiment of the present application;

[0030] Figure 4 It is a partial structural schematic diagram of the installation and matching of the conductive connecting piece in the embodiment of the present application;

[0031] Figure 5 It is a partial cross-sectional structural schematic diagram of the installation distribution of the socket and the flexible circuit board in the embodiment of the present application;

[0032] Figure 6 It is a partial cross-sectional structural schematic diagram of the embodiment of the present application embodying the installation and matching of the socket;

[0033] Figure 7 yes Figure 6 Enlarged schematic diagram of part A.

[0034] In the figure, 1, substrate; 11, first positioning hole; 12, second fixing hole; 121, positioning card slot; 2, aluminum bar; 3, flexible circuit board; 31, second positioning hole; 32, conductive part; 33, first fixing hole; 4, conductive connecting piece; 41, fuse part; 42, connecting part; 5, connecting socket; 51, plug pin; 511, bending part; 52, fixed through groove; 53, fixed recessed groove; 6, fixed plug; 61, locking part; 611, locking tooth; 612, clearance notch; 6121, clamping protrusion; 62, insertion part; 63, positioning plug; 631, positioning card block; 6311, guiding slope; 7, insulating film; 71, third positioning hole. DETAILED DESCRIPTION

[0035] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0036] Example:

[0037] Reference Figure 1 and Figure 2, an integrated busbar connection bar, comprising a substrate 1, and a plurality of aluminum bars 2 symmetrically fixed on the substrate 1, wherein a flexible circuit board 3 is provided on the side of the substrate 1 facing the aluminum bars 2, a connection socket 5 and a plurality of conductive connecting pieces 4 are fixed on the flexible circuit board 3, and the ends of the conductive connecting pieces 4 away from the flexible circuit board 3 are connected to the aluminum bars 2, and an insulating film 7 for covering the flexible circuit board 3 and the aluminum bars 2 is fixed on the side of the substrate 1 by hot pressing;

[0038] Reference Figure 2 and Figure 3 A plurality of first positioning holes 11 are provided on the substrate 1, a second positioning hole 31 overlapping with the first positioning hole 11 is provided on the flexible circuit board 3, and a third positioning hole 71 overlapping with the second positioning hole 31 is provided on the insulating film 7; when the insulating film 7 is fixed on the side of the substrate 1 by hot pressing, the first positioning holes 11, the second positioning holes 31 and the third positioning holes 71 can be limited by corresponding positioning fixtures, thereby reducing the possibility of misalignment of the three when the insulating film 7 is fixed by hot pressing.

[0039] Reference Figure 4 The conductive connecting piece 4 includes a fuse part 41 and connecting parts 42 fixedly arranged on the edges of both sides of the fuse part 41. The two connecting parts 42 are fixedly connected to the flexible circuit board 3 and the aluminum bar 2 respectively. The fuse part 41 is a structure similar to a fuse. When a short circuit occurs in the line connected to the busbar connecting bar, it can be quickly melted and then the circuit is disconnected to avoid causing greater impact.

[0040] Reference Figure 4 and Figure 5 The socket 5 is arranged at one end edge of the flexible circuit board 3, and the socket 5 is fixed on the substrate 1, wherein a plurality of conductive parts 32 are fixedly provided on the side of the flexible circuit board 3 away from the substrate 1, and a plurality of plug pins 51 are fixedly provided on the socket 5, and a bending part 511 abutting against the conductive part 32 is fixedly provided at one end of the plug pin 51, so as to realize the electrical connection between the socket 5 and the flexible circuit board 3.

[0041] Reference Figure 5 and Figure 6 Two fixing plugs 6 are symmetrically fixed on the side of the socket 5 facing the flexible circuit board 3, and the fixing plug 6 includes a locking portion 61 and an inserting portion 62 integrally formed on one side of the locking portion 61, wherein the locking portion 61 is larger than the cross-sectional size of the inserting portion 62, and two positioning plugs 63 are integrally formed on the side of the inserting portion 62 away from the locking portion 61;

[0042] The socket 5 is provided with a fixing through slot 52 for the insertion portion 62 to pass through, and the fixing through slot 52 is provided with a fixing recessed groove 53 for the locking portion 61 to be embedded and fixed at an opening edge away from the flexible circuit board 3. The flexible circuit board 3 is provided with a first fixing hole 33 for the positioning plug 63 to pass through, and the substrate 1 is provided with a second fixing hole 12 for the positioning plug 63 to be embedded.

[0043] Reference Figure 5 A plurality of locking teeth 611 are integrally formed on the opposite side surfaces of the locking portion 61. When the locking portion 61 is inserted into the fixed recess 53, the locking teeth 611 are tightly pressed against the inner wall of the fixed recess 53 with interference fit. A clearance notch 612 is provided on the opening edge of the locking portion 61 away from the insertion portion 62, and a clamping protrusion 6121 is integrally formed on the bottom side of the clearance notch 612. The staff can clamp the clamping protrusion 6121 with the help of a tool, and then apply force to remove the conductive connecting sheet 4.

[0044] Reference Figure 5 A positioning block 631 is integrally formed on the two opposite sides of the positioning block 63, and a guide slope 6311 is provided on the side edge of the positioning block 631 away from the insertion portion 62. A positioning groove 121 for the positioning block 631 to be embedded is provided on the inner wall of the second fixing hole 12. With this arrangement, a fixed connection between the substrate 1 and the positioning block 63 is achieved.

[0045] The implementation principle of the embodiment of the present application is:

[0046] During the assembly of the busbar connection bar, several aluminum bars 2 are welded and fixed on the substrate 1 in advance, the sockets 5 are fixed on the substrate 1, and then the conductive connecting pieces 4 on the flexible circuit board are welded and fixed on the corresponding aluminum bars 2 in sequence, and then the insulating film 7 is fixed on the side of the substrate 1 facing the aluminum bars 2 using a hot pressing device, and at the same time, the insulating film 7 covers the aluminum bars 2 and the flexible circuit board 3.

[0047] Unless otherwise defined, the terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limit, but indicate that there is at least one. "Including" or "comprising" and other similar words mean that the elements or objects appearing in front of "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An integrated busbar connection bar, comprising a substrate (1), and a plurality of aluminum bars (2) fixedly mounted on the substrate (1); a flexible circuit board (3) is arranged on the side of the substrate (1) facing the aluminum bars (2); a connection socket (5) and a plurality of conductive connecting pieces (4) are fixedly mounted on the flexible circuit board (3); an end of the conductive connecting piece (4) away from the flexible circuit board (3) is connected to the aluminum bars (2); an insulating film (7) for covering the flexible circuit board (3) and the aluminum bars (2) is fixedly mounted on the side of the substrate (1); It is characterized in that The substrate (1) is provided with a plurality of first positioning holes (11), the flexible circuit board (3) is provided with a second positioning hole (31) overlapping with the first positioning holes (11), and the insulating film (7) is provided with a third positioning hole (71) overlapping with the second positioning hole (31).

2. The integrated busbar connection bar according to claim 1, characterized in that: The conductive connecting piece (4) comprises a fuse portion (41) and connecting portions (42) fixedly arranged on the edges of both sides of the fuse portion (41), and the two connecting portions (42) are fixedly connected to the flexible circuit board (3) and the aluminum bar (2) respectively.

3. The integrated busbar connection bar according to claim 1, characterized in that: The connection socket (5) is arranged at an edge of one end of the flexible circuit board (3), and the connection socket (5) is also fixed on the substrate (1); a plurality of conductive parts (32) are fixedly arranged on the side of the flexible circuit board (3) away from the substrate (1), a plurality of plug pins (51) are fixedly arranged on the connection socket (5), and a bending part (511) abutting against the conductive part (32) is fixedly arranged at one end of the plug pin (51).

4. The integrated busbar connection bar according to claim 1, characterized in that: A fixing plug (6) is fixedly arranged on the side of the socket (5) facing the flexible circuit board (3); a first fixing hole (33) for the fixing plug (6) to pass through is provided on the flexible circuit board (3); and a second fixing hole (12) for the fixing plug (6) to be embedded is provided on the base plate (1).

5. The integrated busbar connection bar according to claim 4, characterized in that: The fixed insert (6) comprises a locking portion (61) and an inserting portion (62) fixed to one side of the locking portion (61), and a plurality of positioning inserts (63) are provided on a side of the inserting portion (62) away from the locking portion (61); The connecting socket (5) is provided with a fixed through slot (52) for the insertion portion (62) to pass through, and an opening edge of the fixed through slot (52) away from the flexible circuit board (3) is provided with a fixed recessed groove (53) for the locking portion (61) to be embedded and fixed, and the positioning plug (63) is used to penetrate the first fixing hole (33) and then be embedded in the second fixing hole (12).

6. The integrated busbar connection bar according to claim 5, characterized in that: A positioning block (631) is fixedly provided on the outer surface of the positioning plug block (63); a guide slope (6311) is provided on the side edge of the positioning block (631) away from the insertion portion (62); and a positioning groove (121) for the positioning block (631) to be embedded is provided on the inner wall of the second fixing hole (12).

7. The integrated busbar connection bar according to claim 5, characterized in that: A plurality of locking teeth (611) are fixedly provided on the outer side surface of the locking portion (61), and the locking teeth (611) are used to be tightly pressed against the inner wall of the fixed sink groove (53) by interference fit.

8. The integrated busbar connection bar according to claim 5, characterized in that: A clearance notch (612) is provided on the opening edge of the locking portion (61) away from the insertion portion (62), and a clamping protrusion (6121) is fixedly provided on the bottom side of the clearance notch (612).

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