Flexible integrated acquisition busbar

Abstract

The utility model discloses a flexible integrated acquisition busbar, which comprises a plurality of conductive bus metal sheets and output connection terminals which are used for being electrically connected with a battery cell, and further comprises a lower base film, an upper base film and a plurality of sensing chips used for sensing the state of the battery cell, one end of the signal transmission wire is electrically connected with the output connection terminal, and the other end of the signal transmission wire extends to the lower part of the conductive confluence metal sheet or the sensing chip and forms a coil area through spiral wiring, and the coil area is connected with the conductive confluence metal sheet or the sensing chip right above the coil area through soldering tin; the conductive confluence metal sheets and the sensing chips are arranged on the surface, facing the upper base film, of the lower base film, and the upper base film is provided with a plurality of first avoidance through holes allowing the conductive confluence metal sheets to be embedded and a plurality of second avoidance through holes allowing the sensing chips to be embedded. According to the utility model, the production and processing efficiency can be improved, the processing cost can be saved, and the stability of signal transmission in the long-term use process can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile cables, in particular to a flexible integrated collection busbar. Background Art

[0002] In the research and development of power battery technology, the control of various parameters of power batteries is crucial. Existing electric vehicle batteries connect various parts of the battery pack to the system controller through an integrated busbar to obtain the parameters of each part of the battery pack, including voltage, current, temperature and other parameters.

[0003] At present, the parameter transmission carriers of integrated busbars used to collect parameter signals such as battery module temperature and pressure on the market mainly include wire harness, FPC (Flexible Printed Circuit) and FFC (Flexible Flat Cable). Among them, FPC has the characteristics of small size, light weight, easy processing and welding, good heat dissipation, etc. FFC is an upgraded version of wire harness, which is arranged in parallel in strips and also has the advantages of soft texture, small thickness, and easy electromagnetic shielding.

[0004] However, using the wiring harness as a carrier for transmitting the integrated busbar parameters will result in a large number of wiring harnesses on the integrated busbar, making the overall wiring harness of the integrated busbar redundant and causing difficulties in the wiring harness assembly process; the processing technology of FPC and FFC is complex and costly, and will also cause great waste and environmental pollution. The degree of waste and pollution will increase significantly with the increase in the size of the integrated busbar, which is inconsistent with the development needs of increasingly higher requirements for vehicle endurance and an increasing number of battery cells. Utility Model Content

[0005] The utility model aims to provide a flexible integrated acquisition busbar, which can not only improve the efficiency of production and processing, save processing costs, but also ensure the stability of signal transmission during long-term use.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a flexible integrated collection busbar, comprising: a plurality of conductive busbars and output connection terminals for electrically connecting to battery cells, and also comprising: a stacked lower base film, an upper base film and a plurality of sensor chips for sensing the status of battery cells, the conductive busbars and sensor chips are each connected to the output connection terminal through at least one signal transmission wire, and the plurality of signal transmission wires are laid at intervals on the surface of the lower base film facing the upper base film, and the other end of the signal transmission wire, one end of which is electrically connected to the output connection terminal, extends to the bottom of the conductive busbar or the sensor chip and forms a coil area by spiral routing, and the coil area is connected to the conductive busbar or the sensor chip located directly above it by soldering, and the conductive busbar and the sensor chip are both arranged on the surface of the lower base film facing the upper base film, and the upper base film is provided with a plurality of first avoidance through holes for embedding the conductive busbar and a plurality of second avoidance through holes for embedding the sensor chip.

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

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

[0009] 2. In the above solution, the lower base film and the upper base film, the conductive bus metal sheet, the sensor chip and the signal transmission wire are all bonded and connected by an adhesive layer.

[0010] 3. In the above solution, the sensor chip is at least one of a temperature sensor chip and a voltage sensor chip.

[0011] 4. In the above scheme, one end of a conductive metal sheet is electrically connected to the conductive bus metal sheet exposed from the first avoidance 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 has a welding hole for cooperating with the electrode column on the battery cell.

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

[0013] The utility model flexible integrated collection busbar, its conductive busbar metal sheet, sensor chip are each connected to the output connection terminal through at least one signal transmission wire, a plurality of said signal transmission wires are laid at intervals on the surface of the lower base film facing the upper base film, one end of the said signal transmission wire electrically connected to the output connection terminal is extended to the bottom of the conductive busbar metal sheet or the sensor chip and a coil area is formed by spiral routing, the said coil area is connected to the conductive busbar metal sheet or the sensor chip located directly above it by soldering, the said conductive busbar metal sheet and the sensor chip are both arranged on the surface of the lower base film facing the upper base film, The upper base film is provided with a plurality of first avoidance through holes for embedding the conductive bus metal sheet and a plurality of second avoidance through holes for embedding the sensor chip. Signal transmission is achieved by using signal transmission wires with the same wire diameter which are encapsulated between the two base films. This can not only improve the efficiency of production and processing and save processing costs, but also ensure the stability of signal transmission during long-term use. The spiral routing also greatly increases the connection area between the signal transmission wires and the conductive bus metal sheet and the sensor chip, which not only facilitates the connection between the two, but also ensures the effectiveness and stability of the connection, further improving the overall stability of the busbar. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Attached Figure 1 This is a schematic diagram of the structure of the flexible integrated data collection busbar of the utility model;

[0015] Attached Figure 2 For attachment Figure 1 Schematic diagram of the cross section along AA;

[0016] Attached Figure 3 This is a schematic diagram of the structure of the upper base membrane of the flexible integrated collection busbar of the utility model;

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

[0018] Attached Figure 5 It is a schematic diagram of the partial structure of Example 2 of the flexible integrated data collection busbar of the utility model.

[0019] In the above figures: 1. Coil area; 2. Signal transmission wire; 3. Conductive bus metal sheet; 4. Conductive metal sheet; 5. Sensor chip; 6. Output connection terminal; 8. Lower base film; 9. Upper base film; 10. First avoidance through hole; 11. Second avoidance through hole; 12. Welding hole; 13. Adhesive layer. DETAILED DESCRIPTION

[0020] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

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

[0022] The coil area 1 is a circular coil area, and the coil area is formed by spiral routing at the connection between the signal transmission wire and the conductive bus metal sheet and the sensor chip, and then the electrical connection is made by soldering, thereby increasing the area of ​​the connection area between the signal transmission wire and the conductive bus metal sheet and the sensor chip, which is convenient for the connection between the two and can ensure the effectiveness and stability of the connection, further improving the overall stability of the busbar, and the process is simple, the processing cost is low, and the processing cost will not increase significantly with the increase of the product size;

[0023] The sensor chip 5 is a temperature sensor chip; the lower base film 8 and the upper base film 9 , the conductive bus metal sheet 3 , the sensor chip 5 and the signal transmission wire 2 are all bonded and connected via an adhesive layer 13 .

[0024] The signal transmission wire 2 is a round copper wire; the diameter of the signal transmission wire 2 is 30 μm.

[0025] Embodiment 2: A flexible integrated data acquisition busbar, comprising: a plurality of conductive busbars 3 and output connection terminals 6 for electrically connecting to battery cells, and also comprising: a stacked lower base film 8, an upper base film 9 and a plurality of sensor chips 5 for sensing the state of the battery cells, wherein the conductive busbars 3 and the sensor chips 5 are each connected to the output connection terminal 6 through at least one signal transmission wire 2, and the plurality of signal transmission wires 2 are laid at intervals on the surface of the lower base film 8 facing the upper base film 9, and one end of the signal transmission wires 2 is electrically connected to the output connection terminal 6. The other end of the connected signal transmission wire 2 extends to the bottom of the conductive bus metal sheet 3 or the sensor chip 5 and forms a coil area 1 by spiral routing. The coil area 1 is connected to the conductive bus metal sheet 3 or the sensor chip 5 located directly above it by soldering. The conductive bus metal sheet 3 and the sensor chip 5 are both arranged on the surface of the lower base film 8 facing the upper base film 9. The upper base film 9 is provided with a plurality of first avoidance through holes 10 for embedding the conductive bus metal sheet 3 and a plurality of second avoidance through holes 11 for embedding the sensor chip 5.

[0026] The coil area 1 is a rectangular coil area; the sensor 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 bus metal sheet 3 exposed from the first avoidance 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 cooperating with the electrode column on the battery cell.

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

[0030] When using the above-mentioned flexible integrated collection busbar, it uses signal transmission wires encapsulated between two base films and with consistent wire diameters to achieve signal transmission, which can not only improve the efficiency of production and processing, avoid material waste and chemical pollution caused by subtractive processing in the prior art, and save costs, but also ensure the stability of signal transmission during long-term use. The spiral routing also greatly increases the area of ​​the connection between the signal transmission wires and the conductive bus metal sheet and the sensor chip, which not only facilitates the connection between the two, but also ensures the effectiveness and stability of the connection, further improving the overall stability of the busbar.

[0031] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A flexible integrated collection busbar, comprising: A plurality of conductive busbar metal sheets (3) and output connection terminals (6) for electrically connecting to battery cells, characterized in that they also include: a stacked lower base film (8), an upper base film (9) and a plurality of sensor chips (5) for sensing the state of the battery cells, wherein the conductive busbar metal sheets (3) and the sensor chips (5) are each connected to the output connection terminal (6) via at least one signal transmission wire (2), and the plurality of signal transmission wires (2) are laid at intervals on the surface of the lower base film (8) facing the upper base film (9), and one end of the signal transmission wire is electrically connected to the output connection terminal (6). The other end of (2) extends to the bottom of the conductive bus metal sheet (3) or the sensor chip (5) and forms a coil area (1) by spiral routing. The coil area (1) is connected to the conductive bus metal sheet (3) or the sensor chip (5) located directly above it by soldering. The conductive bus metal sheet (3) and the sensor chip (5) are both arranged on the surface of the lower base film (8) facing the upper base film (9). The upper base film (9) is provided with a plurality of first avoidance through holes (10) for embedding the conductive bus metal sheet (3) and a plurality of second avoidance through holes (11) for embedding the sensor chip (5).

2. The flexible integrated data collection busbar according to claim 1, characterized in that: The coil area (1) is a circular coil area or a rectangular coil area.

3. The flexible integrated data collection busbar according to claim 1, characterized in that: The lower base film (8) is bonded to the upper base film (9), the conductive bus metal sheet (3), the sensor chip (5) and the signal transmission wire (2) via an adhesive layer (13).

4. The flexible integrated data collection busbar according to claim 1, characterized in that: The sensor chip (5) is at least one of a temperature sensor chip and a voltage sensor chip.

5. The flexible integrated data collection busbar according to claim 1, characterized in that: One end of a conductive metal sheet (4) is electrically connected to a conductive busbar metal sheet (3) exposed from a first avoidance through hole (10); the other end of the conductive metal sheet (4) extends to the outside of a lower base film (8) and an upper base film (9) and is provided with a welding hole (12) for cooperating with an electrode column on a battery cell.

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