Battery module integrated acquisition busbar

Abstract

The utility model discloses a battery module integrated acquisition busbar, and aims to provide a battery module integrated acquisition busbar with a simple structure, the battery module integrated acquisition busbar comprises a flexible circuit board, the left side and the right side of the outer surface of the flexible circuit board are respectively provided with an FFC assembly and a plurality of conductive busbars, and the FFC assembly comprises an FFC flat cable. The FFC and the conductive busbars are fixedly connected with the flexible circuit board, the plurality of conductive busbars are uniformly distributed along the length direction of the flexible circuit board, one end of the FFC is provided with a plurality of acquisition ends, the FFC is respectively fixed with the plurality of conductive busbars one by one through the plurality of acquisition ends, the acquisition ends are integrated with NTC resistors, the other end of the FFC is an output end, and the output end is connected with the flexible circuit board. And the output ends of the FFCs at the left and right sides of the flexible circuit board are converged and then output. The utility model has the advantages of simple structure, high flatness, stable connection, no need of a special plastic bracket, small occupied space, light weight and low cost.

Description

Technical Field

[0001] The utility model relates to the technical field related to battery modules, in particular to a battery module integrated collection busbar. Background Art

[0002] With the rapid development of the electric vehicle industry, the electrification trend of the powertrain is becoming more and more obvious. As the power core of electric vehicles, batteries are a very important part of the entire electric vehicle. The battery system of an electric vehicle is often composed of many single cells connected in series and parallel. Its efficiency, mileage, and long-term reliability under harsh conditions are related to the performance and safety of the entire vehicle.

[0003] With the standardized development of the industry, the design of battery packs is moving towards standardization, and battery pack components are also designed towards integration. The automation and integration trend of the industry puts forward higher requirements on the design coordination capabilities of component suppliers, as well as the quality and performance of components. In addition, the current cost of electric vehicles is high, and reducing costs at the source of design is the common goal of technical personnel in this field.

[0004] The CCS integrated acquisition busbar is a highly integrated battery signal acquisition and management system. It monitors and manages the voltage, temperature and other data of each single cell in the battery module in real time through the acquisition busbar. This integrated design integrates the acquisition function directly into the structure of the battery module, avoiding additional connection lines and sensors, and greatly simplifying the system layout and maintenance. The existing CCS is mainly composed of a plastic bracket, an FPC component and a conductive busbar (aluminum bar). The FPC component includes an FPC board, a connector, a nickel sheet, an NTC resistor, etc. All devices on the FPC component are mounted on the FPC board through SMT. It has the problems of complex structure, high cost, large space occupation and overall weight. Utility Model Content

[0005] The utility model aims to overcome the shortcomings of the complex structure of the integrated acquisition busbar in the prior art and provides a battery module integrated acquisition busbar with a simple structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A battery module integrated acquisition busbar includes a flexible circuit board, and the outer surface of the flexible circuit board is provided with FFC components and a plurality of conductive busbars on both sides. The FFC component includes an FFC cable, and the FFC cable and the conductive busbar are fixedly connected to the flexible circuit board. The plurality of conductive busbars are evenly distributed along the length direction of the flexible circuit board. One end of the FFC cable is provided with a plurality of acquisition terminals, and the FFC cable is fixed to the plurality of conductive busbars one by one through the plurality of acquisition terminals. The acquisition terminal is integrated with an NTC resistor, and the other end of the FFC cable is an output terminal. The output terminals of the FFC cables on the left and right sides of the flexible circuit board are output after being merged. The FFC cable collects data through the acquisition terminal, and the FFC output terminal outputs and interacts with the BMS for battery parameters; the FFC component replaces the traditional FPC component, and the FFC cable and the plurality of conductive busbars are fixed on the flexible circuit board by pasting and other processes, so as to achieve the purpose of simple structure, and has the advantages of high flatness, stable connection, no need for a special plastic bracket, small space occupation, light weight and low cost.

[0008] Preferably, the FFC cables on the left and right sides of the flexible circuit board are arranged in parallel, and the FFC cables are located between the conductive bus bars on the left and right sides of the flexible circuit board, which is beneficial to saving the arrangement space of components, thereby reducing the occupied space and saving costs.

[0009] Preferably, the conductive busbar includes a metal row 1 and a metal row 2, both of which are fixedly connected to the flexible circuit board, and an upwardly protruding groove 1 is provided between the metal row 1 and the metal row 2, and the metal row 1 is fixedly connected to the metal row 2 through the groove 1 and forms an integral body. The metal row 1 and the metal row 2 are fixedly connected to form an integral body through the groove 1, which facilitates the assembly and fixation of the conductive busbar and the flexible circuit board, and improves production efficiency.

[0010] Preferably, the left and right sides of the flexible circuit board are provided with a plurality of installation areas that match the conductive busbars one by one, and the installation areas are provided with embedding grooves that match the metal row 1 and the metal row 2 one by one respectively, and the bottom of the embedding groove is provided with a through hole and a limiting column, and the limiting column is located at the edge of the embedding groove and on the side of the through hole, and a rib matching the groove 1 is provided between the two embedding grooves, and the rib is fixedly connected to the flexible circuit board, and the metal row 1 and the metal row 2 are provided with positioning holes connected to the through hole and limiting holes matching the limiting column. The metal row 1 and the metal row 2 match the ribs through the groove 1, which plays a good role in indicating the metal row 1 and the metal row 2 to be embedded in the corresponding embedding grooves. At the same time, the limiting column is inserted into the corresponding limiting hole to obtain a preliminary positioning, and then through the positioning hole of the battery pole, it can play a positioning role in the installation and welding process with the battery, thereby facilitating the fixation of the conductive busbar, and at the same time facilitating the improvement of flatness and saving space.

[0011] Preferably, a nickel sheet is provided at the collection end of the FFC cable, one end of the nickel sheet is fixedly connected to the collection end of the FFC cable, and the other end of the nickel sheet is fixedly connected to a metal bus. The collection end of the FFC cable is fixedly connected to the corresponding conductive bus by transferring the nickel sheet to the corresponding conductive bus. The nickel sheet has good flexibility and good formability, and can resist certain stress pulling when the battery module vibrates.

[0012] Preferably, the nickel sheet is provided with a groove 2 protruding downward, the metal row 1 is provided with a socket matching the groove 2, and the nickel sheet is inserted into the socket through the groove 2 and positioned on the metal row 1. The nickel sheet is inserted into the socket through the groove 2 to obtain a preliminary positioning, which is convenient for welding and fixing.

[0013] Preferably, the NTC resistor is cylindrical in shape, one end of the nickel sheet extends outward with an arc-shaped welding groove matching the NTC resistor, and the collection end of the FFC cable is fixedly connected to one end of the nickel sheet through the NTC resistor matching the arc-shaped welding groove. The NTC resistor is inserted into the arc-shaped welding groove, which is conducive to welding positioning and improving the firmness of welding.

[0014] Preferably, the flexible circuit board is provided with a plurality of pressure relief holes, the pressure relief holes are located at the center of the flexible circuit board and between the two FFC cables, and the plurality of pressure relief holes are evenly distributed along the length direction of the flexible circuit board. Since the battery will release deformation tension when it bulges, and some other forces may be affected, the presence of the pressure relief holes can provide good buffering for the integrated acquisition busbar when it is subjected to lateral and longitudinal pulling stresses, thereby improving the overall stability effect.

[0015] The beneficial effects of the utility model are: simple structure, high flatness, stable connection, no need for special plastic brackets, small space occupation, light weight and low cost; saving the arrangement space of components, thereby reducing the occupied space and saving costs; helping to improve production efficiency; the nickel sheet itself has good flexibility and good formability, and can resist certain stress pulling when the battery module vibrates; the presence of the pressure relief avoidance hole enables the integrated collection busbar to be well buffered when subjected to lateral and longitudinal pulling stresses, thereby improving the overall stability effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 A magnified view of the structure at center A;

[0018] Figure 3 It is an exploded view of the utility model;

[0019] Figure 4 It is a schematic diagram of the structure of the conductive bus;

[0020] Figure 5 yes Figure 3 A magnified view of the structure at point B.

[0021] In the figure: 1. flexible circuit board, 2. conductive bus, 3. FFC cable, 4. NTC resistor, 5. metal row 1, 6. metal row 2, 7. groove 1, 8. installation area, 9. embedding groove, 10. rib, 11. positioning hole, 12. nickel sheet, 13. groove 2, 14. jack, 15. arc welding groove, 16. pressure relief avoidance hole, 17. through hole, 18. limit column, 19. limit hole. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0023] like Figure 1 , Figure 2 and Figure 3 In the described embodiment, a battery module integrated collection busbar comprises a flexible circuit board 1, and an FFC component and a plurality of conductive bus bars 2 are arranged on the left and right sides of the outer surface of the flexible circuit board 1, and the FFC component comprises an FFC cable 3, and the FFC cable 3 is located on the side of the conductive bus bar 2, and the FFC cable 3 and the conductive bus bar 2 are both fixedly connected to the flexible circuit board 1, and the plurality of conductive bus bars 2 are evenly distributed along the length direction of the flexible circuit board 1, and one end of the FFC cable 3 is provided with a plurality of collection terminals, and the FFC cable 3 is fixed one by one with the plurality of conductive bus bars 2 through the plurality of collection terminals, and the collection terminal is integrated with an NTC resistor 4, and the other end of the FFC cable 3 is an output terminal, and the output terminals of the FFC cable 3 on the left and right sides of the flexible circuit board 1 are output after being merged.

[0024] like Figure 1 and Figure 3 As shown, the FFC cables 3 on the left and right sides of the flexible circuit board 1 are distributed in parallel, and the FFC cables 3 are located between the conductive bus bars 2 on the left and right sides of the flexible circuit board 1 .

[0025] like Figure 4 As shown, the conductive bus 2 includes a metal row 1 5 and a metal row 2 6, both of which are fixedly connected to the flexible circuit board 1, and an upwardly protruding groove 1 7 is provided between the metal row 1 5 and the metal row 2 6, and the metal row 1 5 is fixedly connected to the metal row 2 6 through the groove 1 7 to form a whole.

[0026] like Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the left and right sides of the flexible circuit board 1 are provided with a plurality of mounting areas 8 that match the conductive busbars 2 one by one, and the mounting areas 8 are provided with embedding grooves 9 that match the metal row 1 5 and the metal row 2 6 one by one respectively, and the bottom of the embedding groove 9 is provided with a through hole 17 and a limiting column 18, and the limiting column 18 is located at the edge of the embedding groove 9 and at the side of the through hole 17, and a rib 10 that matches the groove 1 7 is provided between the two embedding grooves 9, and the rib 10 is fixedly connected to the flexible circuit board 1, and the metal row 1 5 and the metal row 2 6 are provided with a positioning hole 11 connected to the through hole 17 and a limiting hole 19 that matches the limiting column 18.

[0027] like Figure 2 and Figure 4 As shown, a nickel sheet 12 is provided at the collection end of the FFC cable 3, one end of the nickel sheet 12 is fixedly connected to the collection end of the FFC cable 3, and the other end of the nickel sheet 12 is fixedly connected to the metal bar 1 5. A groove 2 convexly protruding downward is provided on the nickel sheet 12, and a socket 14 matching the groove 2 13 is provided on the metal bar 1 5. The nickel sheet 12 is inserted into the socket 14 through the groove 2 13 and then positioned on the metal bar 1 5.

[0028] like Figure 2 As shown, the shape of the NTC resistor 4 is cylindrical, and one end of the nickel sheet 12 extends outward to have an arc-shaped welding groove 15 matching the NTC resistor 4. The collection end of the FFC cable 3 is fixedly connected to one end of the nickel sheet 12 through the NTC resistor 4 matching the arc-shaped welding groove 15.

[0029] like Figure 1 and Figure 3 As shown, the flexible circuit board 1 is provided with a plurality of pressure relief holes 16 , which are located at the center of the flexible circuit board 1 and between two FFC cables 3 , and are evenly distributed along the length direction of the flexible circuit board 1 .

[0030] The FFC cable 3 collects data through the acquisition end, and the output end of the FFC cable 3 outputs and interacts with the BMS for battery parameters; the FFC component replaces the traditional FPC component, and the FFC cable 3 and several conductive bus bars 2 are fixed on the flexible circuit board 1 through processes such as pasting, so as to achieve the purpose of simple structure, with high flatness, stable connection, no need for special plastic brackets, small space occupation, light weight and low cost; the metal row 1 5 and the metal row 2 6 are matched with the rib 10 through the groove 1 7, which plays a good indication role in the embedding of the metal row 1 5 and the metal row 2 6 into the corresponding embedding groove 9, and at the same time, the limit column 18 is inserted into the corresponding limit hole 19 to obtain preliminary positioning, and then through the positioning hole 11 of the battery pole, it can play a positioning role in the installation and welding process with the battery; the nickel sheet 12 is inserted into the jack 14 through the groove 2 13 to obtain preliminary positioning, which is convenient for welding and fixing; The NTC resistor 4 is inserted into the arc-shaped welding groove 15, which is conducive to welding positioning, and finally the collection end of the FFC cable 3 is transferred to the corresponding conductive bus 2 through the nickel sheet 12 to achieve a fixed connection.

Claims

1. A battery module integrated collection busbar, characterized in that: The flexible circuit board (1) comprises a flexible circuit board (1), wherein both left and right sides of the outer surface of the flexible circuit board (1) are provided with an FFC component and a plurality of conductive bus bars (2), wherein the FFC component comprises an FFC cable (3), wherein the FFC cable (3) is located on the side of the conductive bus bar (2), wherein the FFC cable (3) and the conductive bus bar (2) are both fixedly connected to the flexible circuit board (1), wherein the plurality of conductive bus bars (2) are evenly distributed along the length direction of the flexible circuit board (1), wherein one end of the FFC cable (3) is provided with a plurality of collecting terminals, wherein the FFC cable (3) is fixed one by one to the plurality of conductive bus bars (2) through the plurality of collecting terminals, wherein the collecting terminals are integrated with an NTC resistor (4), and the other end of the FFC cable (3) is an output terminal, wherein the output terminals of the FFC cable (3) on the left and right sides of the flexible circuit board (1) are combined and then output.

2. The battery module integrated data collection busbar according to claim 1 is characterized in that: The FFC cables (3) on the left and right sides of the flexible circuit board (1) are arranged in parallel, and the FFC cables (3) are located between the conductive bus bars (2) on the left and right sides of the flexible circuit board (1).

3. The battery module integrated data collection busbar according to claim 1 is characterized in that: The conductive busbar (2) comprises a metal bar 1 (5) and a metal bar 2 (6), wherein the metal bar 1 (5) and the metal bar 2 (6) are both fixedly connected to the flexible circuit board (1), and an upwardly protruding groove 1 (7) is provided between the metal bar 1 (5) and the metal bar 2 (6), and the metal bar 1 (5) is fixedly connected to the metal bar 2 (6) via the groove 1 (7) to form an integral body.

4. The battery module integrated data collection busbar according to claim 3 is characterized in that: The left and right sides of the flexible circuit board (1) are each provided with a plurality of mounting areas (8) that match the conductive busbars (2) one by one. The mounting areas (8) are each provided with embedding grooves (9) that match the metal bar one (5) and the metal bar two (6) one by one. The bottom of the embedding groove (9) is provided with a through hole (17) and a limiting column (18). The limiting column (18) is located at the edge of the embedding groove (9) and at the side of the through hole (17). A rib (10) that matches the groove one (7) is provided between the two embedding grooves (9). The rib (10) is fixedly connected to the flexible circuit board (1). The metal bar one (5) and the metal bar two (6) are each provided with a positioning hole (11) that is connected to the through hole (17) and a limiting hole (19) that matches the limiting column (18).

5. The battery module integrated data collection busbar according to claim 4 is characterized in that: A nickel sheet (12) is provided at the collection end of the FFC cable (3), one end of the nickel sheet (12) is fixedly connected to the collection end of the FFC cable (3), and the other end of the nickel sheet (12) is fixedly connected to the metal bus 1 (5).

6. The battery module integrated data collection busbar according to claim 5 is characterized in that: The nickel sheet (12) is provided with a second groove (13) protruding downwards, and the metal row (5) is provided with a socket (14) matching the second groove (13). The nickel sheet (12) is inserted into the socket (14) through the second groove (13) and is positioned on the metal row (5).

7. The battery module integrated data collection busbar according to claim 5 is characterized in that: The NTC resistor (4) is in the shape of a column, one end of the nickel sheet (12) extends outwardly to form an arc-shaped welding groove (15) that matches the NTC resistor (4), and the collection end of the FFC cable (3) is fixedly connected to one end of the nickel sheet (12) through the NTC resistor (4) matching the arc-shaped welding groove (15).

8. A battery module integrated data collection busbar according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterized in that: The flexible circuit board (1) is provided with a plurality of pressure relief holes (16), the pressure relief holes (16) being located at the centre of the flexible circuit board (1) and between two FFC cables (3), and the plurality of pressure relief holes (16) being evenly distributed along the length direction of the flexible circuit board (1).

Images