Flexible integrated collection busbar

Abstract

A flexible integrated collection busbar, comprising: a plurality of conductive busbar metal sheets (3) used for being electrically connected to battery cells and an output connection terminal (6), and further comprising: a lower base film (8), an upper base film (9) and a plurality of sensing chips (5) used for sensing the states of the battery cells, wherein the lower base film, the upper base film and the plurality of sensing chips are stacked. One end of each signal transmission wire (2) is electrically connected to the output connection terminal (6), and the other end of the signal transmission wire (2) extends below the conductive busbar metal sheets (3) or the sensing chips (5) and forms a coil area (1) by means of spiral routing. The coil areas (1) are connected to the conductive busbar metal sheets (3) or the sensing chips (5) located right above the coil areas (1) by means of soldering. The conductive busbar metal sheets (3) and the sensing chips (5) are all arranged on the surface of the lower base film (9) facing the upper base film (8). A plurality of first clearance through holes (10) allowing for embedment of the conductive busbar metal sheets (3) and a plurality of second clearance through holes (11) allowing for embedment of the sensing chips (5) are formed in the upper base film (9). The flexible integrated collection busbar is designed to be of the described structure, so that the production and processing efficiency can be improved, the processing costs are saved, and the stability of signal transmission during long-term use can also be ensured.

Description

Flexible integrated collection busbar TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile cable, especially to a flexible integrated collection busbar. BACKGROUND

[0002] In the research and development technology of power battery, the control of various parameters of power battery is very important. The existing electric vehicle battery obtains the parameters of each part of the battery pack, including voltage, current, temperature and other parameters, by connecting each part of the battery pack to the system controller through the integrated busbar.

[0003] At present, the parameter transmission carrier of the integrated busbar for collecting battery module temperature and pressure parameter signals on the market mainly includes wire harness, FPC (Flexible Printed Circuit) and FFC (Flexible Flat Cable). Among them, FPC has the characteristics of small size, light weight, convenient processing and welding, good heat dissipation, etc. FFC is an upgraded version of wire harness, which is arranged in a strip shape in parallel, and also has the advantages of soft texture, small thickness and easy electromagnetic shielding.

[0004] However, using wire harness as the parameter transmission carrier of the integrated busbar will result in a large number of wire harnesses on the integrated busbar, making the overall wire harness of the integrated busbar redundant and difficult to assemble. The processing technology of FPC and FFC is complex and costly, which will cause a lot of waste and environmental pollution, and the degree of waste and pollution will increase significantly with the increase of the size of the integrated busbar, which is not consistent with the development demand of increasing the number of battery cells and the requirement of increasing the endurance of the automobile. SUMMARY

[0005] The utility model aims to provide a flexible integrated collection busbar, which can improve the production and processing efficiency, save processing cost, and ensure the stability of signal transmission during long-term use.

[0006] The utility model discloses a flexible integrated collection busbar, including: a plurality of conductive busbar metal sheet and output connection terminal for with battery cell electric connection, still including: the lower base film of superposition, upper base film and a plurality of sensing chip for inductive battery cell state, conductive busbar metal sheet, sensing chip respectively all are connected with output connection terminal through at least one signal transmission wire, a plurality of signal transmission wire interval laying in the surface of lower base film towards upper base film, one end with output connection terminal electric connection signal transmission wire's other end extends to conductive busbar metal sheet or sensing chip below and forms a coil area through spiral wire, the coil area is connected with the conductive busbar metal sheet or sensing chip in its directly above through soldering tin, the conductive busbar metal sheet and sensing chip all are arranged on the surface of lower base film towards upper base film, the upper base film is opened and is equipped with a plurality of first position-avoiding through -hole for conductive busbar metal sheet inserts and a plurality of second position-avoiding through -hole for sensing chip inserts.

[0007] The further improved scheme in the above technical scheme is as follows:

[0008] 1. In the above scheme, the coil area is a circular coil area or a rectangular coil area.

[0009] 2. In the above scheme, the lower base film and the upper base film, the conductive busbar metal sheet, the sensing chip and the signal transmission wire are all connected by a glue layer.

[0010] 3. In the above scheme, the sensing chip is at least one of a temperature sensing chip or a voltage sensing chip.

[0011] 4. In the above scheme, one end of a conductive metal sheet is electrically connected with the conductive busbar metal sheet exposed from the first position-avoiding through-hole, and the other end of the conductive metal sheet extends to the outside of the lower base film and the upper base film and is provided with a welding hole for cooperating with the electrode column on the battery cell.

[0012] Due to the use of the above technical scheme, the utility model has the following advantages compared with the prior art:

[0013] The utility model discloses flexible integrated collection busbar, and the conductive busbar metal sheet, sensing chip each all are connected with the output connection terminal through at least one signal transmission wire, and the signal transmission wire is laid in the surface of the lower base film towards the upper base film, and the other end of the signal transmission wire is extended to the conductive busbar metal sheet or sensing chip below and forms a coil area through spiral wire, and the coil area and the conductive busbar metal sheet or sensing chip above are connected through soldering tin, and the conductive busbar metal sheet and sensing chip are all arranged on the surface of the lower base film towards the upper base film, and the upper base film is provided with a plurality of first position-avoiding through holes for the conductive busbar metal sheet and a plurality of second position-avoiding through holes for the sensing chip, and the signal transmission wire of the same wire diameter is encapsulated between the two base films and realizes signal transmission, which can improve the production efficiency, save the processing cost, ensure the stability of signal transmission during long-term use, and greatly improve the area of the signal transmission wire and the conductive busbar metal sheet and sensing chip connection area through spiral wire, which is convenient for the connection between the two, can ensure the effectiveness and stability of the connection, and further improve the stability of the busbar as a whole. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic diagram of the flexible integrated collection busbar of the utility model;

[0015] Figure 2 is a sectional view along A-A in figure 1;

[0016] Figure 3 is a structural schematic diagram of the upper base film of the flexible integrated collection busbar of the utility model;

[0017] Figure 4 is a partial structural schematic diagram of embodiment 1 of the flexible integrated collection busbar of the utility model;

[0018] Figure 5 is a partial structural schematic diagram of embodiment 2 of the flexible integrated collection busbar of the utility model.

[0019] In the above drawings: 1, coil area; 2, signal transmission wire; 3, conductive busbar metal sheet; 4, conductive metal sheet; 5, sensing chip; 6, output connection terminal; 8, lower base film; 9, upper base film; 10, first position-avoiding through hole; 11, second position-avoiding through hole; 12, soldering hole; 13, adhesive layer. DETAILED DESCRIPTION

[0020] The specific embodiments given below can further clearly understand the patent, but they are not limited to the patent.

[0021] Embodiment 1: A flexible integrated collection busbar, comprising: a plurality of conductive busbar metal sheets 3 for electrical connection with battery cells and output connection terminals 6, further comprising: a lower base film 8, an upper base film 9, and a plurality of sensing chips 5 for sensing the state of the battery cells, the conductive busbar metal sheets 3 and the sensing chips 5 are each connected to the output connection terminals 6 through at least one signal transmission wire 2, a plurality of signal transmission wires 2 are laid on the surface of the lower base film 8 facing the upper base film 9, one end of the signal transmission wire 2 is electrically connected to the output connection terminal 6, and the other end of the signal transmission wire 2 extends below the conductive busbar metal sheet 3 or the sensing chip 5 and forms a coil area 1 through spiral wiring, the coil area 1 is connected to the conductive busbar metal sheet 3 or the sensing chip 5 located directly above it through soldering, the conductive busbar metal sheet 3 and the sensing chip 5 are arranged on the surface of the lower base film 8 facing the upper base film 9, and the upper base film 9 is provided with a plurality of first avoidance through holes 10 for embedding the conductive busbar metal sheet 3 and a plurality of second avoidance through holes 11 for embedding the sensing chip 5.

[0022] The coil area 1 is a circular coil area, and the coil area is formed by spiral wiring at the connection between the signal transmission wire and the conductive busbar metal sheet and the sensing chip, and then connected by soldering, which increases the area of the connection between the signal transmission wire and the conductive busbar metal sheet and the sensing chip, facilitates the connection between them, ensures the effectiveness and stability of the connection, further improves the stability of the busbar as a whole, and has simple process and low processing cost, and the processing cost will not increase significantly with the increase of product size.

[0023] The sensing chip 5 is a temperature sensing chip, and the lower base film 8 is connected to the upper base film 9, the conductive busbar metal sheet 3, the sensing chip 5, and the signal transmission wire 2 through an adhesive layer 13.

[0024] The signal transmission wire 2 is a circular copper wire, and the diameter of the signal transmission wire 2 is 30 μm.

[0025] Embodiment 2: A flexible integrated collection busbar, comprising: a plurality of conductive busbar metal sheets 3 for electrical connection with battery cells and an output connection terminal 6, further comprising: a lower base film 8, an upper base film 9, and a plurality of sensing chips 5 for sensing the state of the battery cells, the conductive busbar metal sheets 3 and the sensing chips 5 are each connected to the output connection terminal 6 through at least one signal transmission wire 2, a plurality of signal transmission wires 2 are spaced apart and laid on the surface of the lower base film 8 facing the upper base film 9, one end of the signal transmission wire 2 electrically connected to the output connection terminal 6 extends to below the conductive busbar metal sheet 3 or the sensing chip 5 and forms a coil area 1 through spiral wiring, the coil area 1 is connected to the conductive busbar metal sheet 3 or the sensing chip 5 located directly above it through soldering, the conductive busbar metal sheet 3 and the sensing chip 5 are both arranged on the surface of the lower base film 8 facing the upper base film 9, a plurality of first avoidance through holes 10 for embedding the conductive busbar metal sheet 3 and a plurality of second avoidance through holes 11 for embedding the sensing chip 5 are provided on the upper base film 9.

[0026] The coil area 1 is a rectangular coil area; the sensing chip 5 is a voltage sensing chip.

[0027] The diameter of the signal transmission wire 2 is 70 μm.

[0028] One end of a conductive metal sheet 4 is electrically connected to the conductive busbar metal sheet 3 exposed from the first avoidance through hole 10, the other end of the conductive metal sheet 4 extends to the outside of the lower base film 8 and the upper base film 9 and is provided with a welding hole 12 for cooperating with the electrode column on the battery cell.

[0029] The output connection terminal 6 is arranged in the middle of one end of the lower base film 8, and the ends of a plurality of signal transmission wires 2 connected to the output connection terminal 6 are arranged at equal intervals in the width direction of the lower base film 8.

[0030] When the above flexible integrated collection busbar is used, the signal transmission is realized by using signal transmission wires with the same diameter packaged between two base films, which can improve the production and processing efficiency, avoid material waste and chemical pollution caused by subtractive processing in the prior art, save costs, ensure the stability of signal transmission during long-term use, and greatly increase the area of the connection area between the signal transmission wire and the conductive busbar metal sheet and the sensing chip through spiral wiring, which facilitates the connection between the two and ensures the effectiveness and stability of the connection, further improving the stability of the busbar as a whole.

[0031] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A flexible integrated harvesting busbar, comprising: The application relates to a battery cell state sensing device, which comprises a plurality of conductive bus metal sheets (3) and output connection terminals (6) for electrically connecting with battery cells, characterized in that the device further comprises a lower base film (8), an upper base film (9) and a plurality of sensing chips (5) for sensing the state of the battery cells, the conductive bus metal sheets (3) and the sensing chips (5) are respectively connected with the output connection terminals (6) through at least one signal transmission wire (2), the signal transmission wires (2) are laid on the surface of the lower base film (8) facing the upper base film (9) at intervals, one end of the signal transmission wire (2) is electrically connected with the output connection terminal (6), and the other end of the signal transmission wire (2) extends to below the conductive bus metal sheet (3) or the sensing chip (5) and forms a coil area (1) through spiral wiring, the coil area (1) is connected with the conductive bus metal sheet (3) or the sensing chip (5) located directly above the coil area (1) through soldering, the conductive bus metal sheet (3) and the sensing chip (5) are arranged on the surface of the lower base film (8) facing the upper base film (9), and a plurality of first avoiding through holes (10) for embedding the conductive bus metal sheets (3) and a plurality of second avoiding through holes (11) for embedding the sensing chips (5) are formed in the upper base film (9).

2. The flexible integrated harvesting busbar of claim 1, wherein: The coil area (1) is a circular coil area or a rectangular coil area.

3. The flexible integrated harvesting busbar of claim 1, wherein: The lower base film (8) is connected with the upper base film (9), the conductive bus metal sheet (3), the sensing chip (5) and the signal transmission wire (2) through a glue layer (13).

4. The flexible integrated harvesting busbar of claim 1, wherein: The sensing chip (5) is at least one of a temperature sensing chip or a voltage sensing chip.

5. The flexible integrated harvesting busbar of claim 1, wherein: One end of a conductive metal sheet (4) is electrically connected with the conductive bus metal sheet (3) exposed from the first avoiding through hole (10), and the other end of the conductive metal sheet (4) extends to the outside of the lower base film (8) and the upper base film (9) and is provided with a welding hole (12) for matching with an electrode column on the battery cell.

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