Module integrated busbar

Abstract

The utility model discloses a module integrated busbar which comprises a PCB integrated board, a positive electrode battery module arranged on one side of the bottom of the PCB integrated board and connected with the PCB integrated board, and a negative electrode battery module arranged on the other side of the bottom of the PCB integrated board and connected with the PCB integrated board. The two sides of one end of the top of the PCB integrated board are connected with a positive electrode copper bar and a negative electrode copper bar respectively, and the other end of the top of the PCB integrated board is further connected with a series connection copper bar. The positive electrode battery module is connected in series with the negative electrode battery module through the series copper bar; the positive battery module comprises a plurality of groups of first battery components which are connected in series and are arranged side by side along the length direction of the PCB integrated board. According to the utility model, an aluminum bar is replaced by the nickel sheet, and the collection wire harness is integrated on one PCB, so that the welding difficulty is reduced, the labor cost is reduced, meanwhile, the plasticity of the nickel sheet is higher than that of the aluminum bar, the expansion problem of the battery cells can be relieved, the use safety of the battery is improved, and when the battery is connected in parallel, the aluminum sheet is additionally arranged between the battery cells, so that the battery quality is improved. And the over-current performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, and in particular to a module integrated busbar. Background Technology

[0002] Currently, lithium battery cells mostly use a distributed component welding method (aluminum busbars, voltage acquisition lines, temperature acquisition lines). Lithium batteries will expand after prolonged use, and this expansion poses a serious threat to the connections between battery cell modules. At the same time, aluminum connections are also at risk of detachment, and the assembly and welding process is cumbersome, increasing production costs. Utility Model Content

[0003] The purpose of this utility model is to provide a module integrated busbar. This utility model replaces aluminum busbars with nickel sheets and integrates the data acquisition harness on a PCB board, thereby reducing the welding difficulty and labor costs. At the same time, nickel sheets are more malleable than aluminum busbars, which can alleviate the problem of cell expansion and improve the safety of battery use. Furthermore, when making parallel batteries, adding aluminum sheets between the cells can improve the overcurrent performance.

[0004] To achieve the above objectives, the following technical solution is adopted:

[0005] A module integrated busbar includes a PCB integrated board, a positive battery module disposed on and connected to one side of the bottom of the PCB integrated board, and a negative battery module disposed on and connected to the other side of the bottom of the PCB integrated board; a positive copper busbar and a negative copper busbar are respectively connected to both sides of the top end of the PCB integrated board, and a series copper busbar is also connected to the other top end of the PCB integrated board; the positive battery module is connected in series with the negative battery module via the series copper busbar; the positive battery module includes several groups of first battery components, which are connected in series and arranged side by side along the length of the PCB integrated board; the negative battery module includes... A plurality of second battery modules are connected in series and arranged side-by-side along the length of a PCB integrated board; the first battery module includes a plurality of first batteries, and each first battery has a first nickel plate mounted on its top for connecting the first battery to the PCB integrated board; the plurality of first batteries are arranged side-by-side along the width of the PCB integrated board and connected in parallel to each other via a positive copper busbar; the second battery module includes a plurality of second batteries, and each second battery has a second nickel plate mounted on its top for connecting it to the PCB integrated board; the plurality of second batteries are arranged side-by-side along the width of the PCB integrated board and connected in parallel to each other via a negative copper busbar.

[0006] Furthermore, both the first nickel sheet and the second nickel sheet include a first fixing piece; the first fixing piece has a U-shaped structure, and a first slot is opened on each side of the horizontal end of the U-shape of the first fixing piece; the two vertical ends of the U-shape of the first fixing piece are also respectively connected to a first connecting piece for connecting with the PCB integrated board.

[0007] Furthermore, the first connecting piece has an L-shaped structure, with the horizontal end of the L-shaped first connecting piece arranged on the PCB integrated board, and several fixing holes are also provided at the top of the horizontal end of the L-shaped first connecting piece; a second connecting piece is also connected to the top of the vertical end of the L-shaped first connecting piece, the second connecting piece has an upwardly convex arc structure, and one end of the second connecting piece is connected to the top of the vertical end of the U-shaped first fixing piece.

[0008] Furthermore, the top of the second connecting piece is provided with a plurality of first through holes spaced apart along its length.

[0009] Furthermore, the first slot has a semi-circular structure.

[0010] Furthermore, the PCB integrated board is also connected with a plurality of first busbar aluminum sheets and a plurality of second busbar aluminum sheets; the first busbar aluminum sheets are arranged between two adjacent first battery modules, and the second busbar aluminum sheets are arranged between two adjacent second battery modules.

[0011] Furthermore, the top of one end of the PCB integrated board, which has a series copper busbar, is also connected to a voltage acquisition terminal and a temperature acquisition terminal.

[0012] By adopting the above solution, the beneficial effects of this utility model are:

[0013] This invention replaces aluminum busbars with nickel sheets and integrates the data acquisition harness onto a single PCB board, thereby reducing welding difficulty and labor costs. In addition, nickel sheets are more malleable than aluminum busbars, which can alleviate the problem of cell expansion and improve the safety of battery use. Furthermore, when making parallel batteries, adding aluminum sheets between the cells can improve overcurrent performance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the PCB integrated board of this utility model;

[0016] Figure 3 This is a partial structural schematic diagram of the PCB integrated board of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the nickel sheet of this utility model;

[0018] The following are explanations of the labels in the attached diagram:

[0019] 1. PCB integrated board; 2. Positive copper busbar; 3. Negative copper busbar; 4. Series copper busbar; 5. First battery; 6. First busbar aluminum sheet; 7. Voltage acquisition terminal; 8. Temperature acquisition terminal; 51. First nickel sheet; 511. First fixing piece; 512. First slot; 513. First connecting piece; 514. Fixing hole; 515. Second connecting piece; 516. First through hole. Detailed Implementation

[0020] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Reference Figures 1 to 4 As shown, this utility model provides a module integrated busbar. In one embodiment, it includes a PCB integrated board 1, a positive battery module arranged on one side of the bottom of the PCB integrated board 1 and connected thereto, and a negative battery module arranged on the other side of the bottom of the PCB integrated board 1 and connected thereto. Positive copper busbars 2 and negative copper busbars 3 are respectively connected to both sides of the top end of the PCB integrated board 1, and a series copper busbar 4 is also connected to the other top end of the PCB integrated board 1. The positive battery module is connected in series with the negative battery module via the series copper busbar 4. The positive battery module includes several sets of first battery components, which are connected in series and arranged side-by-side along the length of the PCB integrated board 1. The first battery module includes several sets of second battery components, which are connected in series and arranged side by side along the length of the PCB integrated board 1. The first battery component includes several first batteries 5, and each first battery 5 has a first nickel plate 51 installed on its top for connecting the first battery 5 to the PCB integrated board 1. The several first batteries 5 are arranged side by side along the width of the PCB integrated board 1 and connected in parallel to each other via a positive copper busbar 2. The second battery module includes several second batteries, and each second battery has a second nickel plate installed on its top for connecting it to the PCB integrated board 1. The several second batteries are arranged side by side along the width of the PCB integrated board 1 and connected in parallel to each other via a negative copper busbar 3.

[0022] In this embodiment, there are 8 sets of both the first and second battery modules. The 8 sets of first battery modules are connected in series, and the 8 sets of second battery modules are connected in series. The series-connected first battery modules are then connected to the series-connected second battery modules. Each set of first battery modules includes three first batteries 5 connected in parallel, and each set of second battery modules includes three second batteries connected in parallel. The PCB integrated board 1 integrates current, voltage, and temperature acquisition circuits. Simultaneously, the PCB integrated board 1 is also connected to several first busbars 6 and several second busbars. The first busbars 6 are arranged between two adjacent first battery modules (two first busbars 6 are arranged between each pair of adjacent first battery modules), and the second busbars are arranged between two adjacent second battery modules (two second busbars are arranged between each pair of adjacent second battery modules). The current lines on the PCB integrated board 1 are very thin, and the busbars enhance the current carrying capacity. In addition, the top of one end of the series copper busbar 4 on the PCB integrated board 1 is connected to a voltage acquisition terminal 7 and a temperature acquisition terminal 8, facilitating the monitoring and acquisition of battery voltage and temperature signals from the backend, thus improving the safety of the busbar.

[0023] In one embodiment, both the first nickel sheet 51 and the second nickel sheet include a first fixing piece 511; the first fixing piece 511 has a U-shaped structure, and a first slot 512 is formed on each side of the horizontal end of the U-shape of the first fixing piece 511; the two vertical ends of the U-shape of the first fixing piece 511 are also connected to a first connecting piece 513 for connecting with the PCB integrated board 1; the first connecting piece 513 has an L-shaped structure, the horizontal end of the L-shaped structure of the first connecting piece 513 is arranged on the PCB integrated board 1, and a plurality of fixing holes 514 are formed at the top of the horizontal end of the L-shaped structure of the first connecting piece 513; a second connecting piece 515 is also connected to the top of the vertical end of the L-shaped structure of the first connecting piece 513, the second connecting piece 515 has an upwardly convex arc-shaped structure, and one end of the second connecting piece 515 is connected to the top of the vertical end of the U-shape of the first fixing piece 511; a plurality of first through holes 516 are formed at intervals along the length direction of the top of the second connecting piece 515; the first slot 512 has a semi-circular structure.

[0024] The PCB integrated board 1 has several second through holes. Each battery (first battery 5 and second battery) is arranged below a second through hole, and the positive and negative terminals of the battery are arranged in the second through hole. The U-shaped horizontal end of the first fixing piece 511 is arranged on the top of the battery and is snapped onto the positive and negative terminals of the battery through the first slot 512. The nickel sheet is designed as a U-shaped bending structure, which can improve the flexibility of the nickel sheet and thus buffer the expansion of the battery cell and the solder joints connected to the battery cell, thereby avoiding major product quality problems caused by desoldering. At the same time, the top of the L-shaped horizontal end of the first connecting piece 513 is also provided with several fixing holes 514. The fixing holes 514 are distributed in multiple rows to facilitate tinning and improve the stability of the connection between the nickel sheet and the PCB integrated board 1.

[0025] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A modular integrated busbar, characterized in that, The system includes a PCB integrated board, a positive battery module disposed on and connected to one side of the bottom of the PCB integrated board, and a negative battery module disposed on and connected to the other side of the bottom of the PCB integrated board; positive and negative copper busbars are respectively connected to both sides of one top end of the PCB integrated board, and a series copper busbar is also connected to the other top end of the PCB integrated board; the positive battery module is connected in series with the negative battery module via the series copper busbar; the positive battery module includes several groups of first battery components, which are connected in series and arranged side by side along the length of the PCB integrated board; the negative battery module includes several groups of first battery components. The first battery assembly comprises several sets of second battery assemblies connected in series and arranged side-by-side along the length of the PCB integrated board; the first battery assembly includes several first batteries, and each first battery has a first nickel plate mounted on its top for connecting the first battery to the PCB integrated board; the several first batteries are arranged side-by-side along the width of the PCB integrated board and connected in parallel to each other via a positive copper busbar; the second battery assembly comprises several second batteries, and each second battery has a second nickel plate mounted on its top for connecting it to the PCB integrated board; the several second batteries are arranged side-by-side along the width of the PCB integrated board and connected in parallel to each other via a negative copper busbar.

2. The module integrated busbar according to claim 1, characterized in that, Both the first nickel sheet and the second nickel sheet include a first fixing piece; the first fixing piece has a U-shaped structure, and a first slot is opened on each side of the horizontal end of the U-shape of the first fixing piece; the two vertical ends of the U-shape of the first fixing piece are also respectively connected to a first connecting piece for connecting with the PCB integrated board.

3. The module integrated busbar according to claim 2, characterized in that, The first connecting piece has an L-shaped structure. The horizontal end of the first connecting piece is arranged on the PCB integrated board, and several fixing holes are also provided at the top of the horizontal end of the first connecting piece. The top of the vertical end of the first connecting piece is also connected to a second connecting piece. The second connecting piece has an upwardly convex arc structure, and one end of the second connecting piece is connected to the top of the vertical end of the first fixing piece.

4. The module integrated busbar according to claim 3, characterized in that, The top of the second connecting piece is provided with a plurality of first through holes spaced apart along its length.

5. The module integrated busbar according to claim 2, characterized in that, The first slot has a semi-circular structure.

6. The module integrated busbar according to claim 1, characterized in that, The PCB integrated board is also connected to a plurality of first busbar aluminum sheets and a plurality of second busbar aluminum sheets; the first busbar aluminum sheets are arranged between two adjacent first battery modules, and the second busbar aluminum sheets are arranged between two adjacent second battery modules.

7. The module integrated busbar according to claim 1, characterized in that, The PCB integrated board has a series copper busbar at one end, and a voltage acquisition terminal and a temperature acquisition terminal are also connected to the top of the busbar.

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