Stable battery acquisition busbar

Abstract

The utility model discloses a stable battery acquisition busbar, which is characterized in that a conductive bus metal sheet and a sensing chip of the stable battery acquisition busbar are respectively connected with an output connecting terminal through at least one signal transmission lead, and the plurality of signal transmission leads are laid on the surface of one side of a base film; 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; and the bent part of the signal transmission wire is arc-shaped. According to the utility model, the processing cost can be saved, the overall flexibility and bending resistance can be improved, the area of the connection area of the signal transmission wire, the conductive bus metal sheet and the sensing chip can be increased, and the effectiveness and stability of the connection between the signal transmission wire and the conductive bus metal sheet can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile cables, in particular to a stable battery 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 the subtractive processing method 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 purpose of the utility model is to provide a stable battery collection busbar, which can not only save processing costs and improve overall flexibility and bending resistance, but also increase the area of ​​the connection area between the signal transmission wire and the conductive bus metal sheet and the sensor chip, thereby ensuring the effectiveness and stability of the connection between the two.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a stable battery collection busbar, comprising: a plurality of conductive busbars and output connection terminals for electrically connecting to battery cells, and a plurality of sensor chips for sensing the status of battery cells, wherein the conductive busbars and sensor chips are each connected to the output connection terminals through at least one signal transmission wire, and the plurality of signal transmission wires are laid on one side surface of a 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 bending part of the signal transmission wire is set to an arc shape.

[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 signal transmission wire further includes a metal wire and an insulating layer covering the outside of the metal wire.

[0010] 3. In the above solution, the insulating layer of the signal transmission wire and the base film are bonded and connected via an adhesive layer.

[0011] 4. In the above solution, the conductive bus metal sheet and the sensor chip are both bonded and connected to the base film through an adhesive layer.

[0012] 5. In the above solution, the sensor chip is at least one of a temperature sensor chip and a voltage sensor chip.

[0013] 6. In the above solution, one end of a conductive metal sheet is electrically connected to the conductive bus metal sheet, and the other end of the conductive metal sheet extends to the outside of the base film and is provided with a welding hole for cooperating with the electrode column on the battery cell.

[0014] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0015] The utility model provides a stable battery collection busbar, wherein the conductive busbar metal sheet and the sensor chip are each connected to the output connection terminal through at least one signal transmission wire, and a plurality of the signal transmission wires are laid on one side surface of a 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 metal sheet or the sensor chip and forms a coil area through spiral routing, and the coil area is connected to the conductive busbar metal sheet or the sensor chip located directly above it through soldering, and the bending part of the signal transmission wire is set to an arc shape, which can improve the efficiency of production and processing and avoid pollution during the processing. , save processing costs, improve the overall flexibility and bending resistance, and improve the consistency of the signal transmission wire after processing, thereby ensuring its stability and reliability in signal transmission. It can also increase the area of ​​the connection 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; further, the signal transmission wire further includes a metal wire and an insulating layer coated on the outside of the metal wire, which can effectively avoid mutual interference between similar signal transmission wires, and further improve the stability and reliability of signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 This is a schematic diagram of the structure of the stable battery collection busbar of the utility model;

[0017] Attached Figure 2 For attachment Figure 1 Schematic diagram of the cross section along AA;

[0018] Attached Figure 3 For attachment Figure 2 The enlarged schematic diagram of point B in the middle;

[0019] Attached Figure 4 It is a partial structural schematic diagram of Example 1 of the stable battery collection busbar of the utility model;

[0020] Attached Figure 5 It is a partial structural schematic diagram of Example 2 of the stable battery collection busbar of the utility model;.

[0021] In the above figures: 1, coil area; 2, signal transmission wire; 21, metal wire; 22, insulation layer; 3, conductive bus metal sheet; 4, conductive metal sheet; 5, sensor chip; 6, output connection terminal; 8, base film; 9, adhesive layer; 10, welding hole. DETAILED DESCRIPTION

[0022] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0023] Embodiment 1: A stable battery collection busbar comprises: a plurality of conductive busbar metal sheets 3 and output connection terminals 6 for electrically connecting to battery cells, and a plurality of sensor chips 5 for sensing the status of battery cells, wherein the conductive busbar metal sheets 3 and the sensor chips 5 are each connected to the output connection terminals 6 via at least one signal transmission wire 2, and the plurality of signal transmission wires 2 are laid on one side surface of a base film 8, and the other end of the signal transmission wire 2, one end of which is electrically connected to the output connection terminal 6, extends to below the conductive busbar metal sheet 3 or the sensor chip 5 and forms a coil area 1 by spiral routing, and the coil area 1 is connected to the conductive busbar metal sheet 3 or the sensor chip 5 directly above it by soldering, and the bending part of the signal transmission wire 2 is set to an arc shape.

[0024] The coil area 1 is a circular coil area.

[0025] The signal transmission wire 2 further includes a metal wire 21 and an insulating layer 22 covering the outside of the metal wire 21 .

[0026] The sensor chip 5 is a temperature sensor chip.

[0027] The insulating layer 22 of the above-mentioned signal transmission conductor 2 is bonded to the base film 8 through an adhesive layer 9. The adhesive layer can be obtained by coating on the base film, and the signal transmission conductor is printed on the adhesive layer that has not yet been completely cured; or the signal transmission conductor to be printed can be first passed through the adhesive and then printed onto the base film, thereby forming an adhesive layer to achieve the connection and fixation between the upper base film and the metal conductor.

[0028] The metal wire 21 is a round copper wire; the diameter of the metal wire 21 is 30 μm.

[0029] Embodiment 2: A stable battery collection busbar comprises: a plurality of conductive busbar metal sheets 3 and output connection terminals 6 for electrically connecting to battery cells, and a plurality of sensor chips 5 for sensing the state of battery cells, wherein the conductive busbar metal sheets 3 and the sensor chips 5 are each connected to the output connection terminals 6 by at least one signal transmission wire 2, and the plurality of signal transmission wires 2 are laid on one side surface of a base film 8, and the other end of the signal transmission wire 2, one end of which is electrically connected to the output connection terminal 6, extends to the bottom of the conductive busbar metal sheet 3 or the sensor chip 5 and forms a coil area 1 by spiral routing, and the coil area 1 is connected to the conductive busbar metal sheet 3 or the sensor chip 5 located directly above it by soldering, and the bending part of the signal transmission wire 2 is set to an arc shape.

[0030] The coil area 1 is a rectangular coil area.

[0031] The signal transmission wire 2 further includes a metal wire 21 and an insulating layer 22 covering the outside of the metal wire 21 .

[0032] The sensor chip 5 is a voltage sensing chip.

[0033] One end of a conductive metal sheet 4 is electrically connected to the conductive bus metal sheet 3 , and the other end of the conductive metal sheet 4 extends to the outside of the base film 8 and is provided with a welding hole 10 for matching with the electrode column on the battery cell.

[0034] The diameter of the metal wire 21 is 70 μm.

[0035] The output connection terminal 6 is disposed in the middle of one end of the 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 base film 8 .

[0036] Compared with the prior art that uses FPC to obtain metal wires and fixed routing shapes through chemical etching and uses FFC to obtain metal wires of fixed shapes through processes such as embossing, the present application will not produce any material waste and pollution during the processing process, and can obtain any routing shape without increasing any cost by setting the printing route. Therefore, a 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 an electrical connection is made through soldering to increase 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. Free routing can also make the transition at the bend more natural through curves to ensure the stability and consistency of signal transmission, thereby obtaining a product with better overall flexibility, stability and bending resistance. The process is simple, the processing cost is low, and the processing cost will not increase significantly with the increase in product size.

[0037] When the above-mentioned stable battery collection busbar is used, the signal transmission wires with consistent wire diameters are laid on the base film by printing to realize the signal connection between the conductive busbar metal sheet, the sensor chip and the output connection terminal, 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, save costs and improve the overall flexibility and bending resistance, but also enrich the routing shape of the signal transmission wires, improve the consistency of the signal transmission wires after processing, especially the bends can have a smooth transition to avoid stress concentration, thereby ensuring its stability and reliability in signal transmission, and can also increase the area of ​​the connection area between the signal transmission wire and the conductive busbar 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; further, the signal transmission wire further includes a metal wire and an insulating layer coated on the outside of the metal wire, which can effectively avoid mutual interference between similar signal transmission wires, and further improve the stability and reliability of signal transmission.

[0038] 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 stable battery 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: a plurality of sensor chips (5) for sensing the state of the battery cells are also included, the conductive busbar metal sheets (3) and the sensor chips (5) are each connected to the output connection terminals (6) via at least one signal transmission wire (2), the plurality of signal transmission wires (2) are laid on a side surface of a base film (8), one end of the signal transmission wire (2) being electrically connected to the output connection terminal (6) extends to below the conductive busbar metal sheet (3) or the sensor chip (5) at the other end and forms a coil area (1) by spiral routing, the coil area (1) is connected to the conductive busbar metal sheet (3) or the sensor chip (5) located directly above it via soldering, and the bend of the signal transmission wire (2) is arranged to be arc-shaped.

2. The stable battery collection busbar according to claim 1 is characterized in that: The coil area (1) is a circular coil area or a rectangular coil area.

3. The stable battery collection busbar according to claim 1 is characterized in that: The signal transmission wire (2) further comprises a metal wire (21) and an insulating layer (22) coated on the outside of the metal wire (21).

4. The stable battery collection busbar according to claim 3 is characterized in that: The insulating layer (22) of the signal transmission wire (2) and the base film (8) are bonded and connected via an adhesive layer (9).

5. The stable battery collection busbar according to claim 4 is characterized in that: The conductive bus metal sheet (3) and the sensor chip (5) are both bonded and connected to the base film (8) via an adhesive layer (9).

6. The stable battery 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.

7. The stable battery collection busbar according to claim 1, characterized in that: One end of a conductive metal sheet (4) is electrically connected to the conductive busbar metal sheet (3), and the other end of the conductive metal sheet (4) extends to the outside of the base film (8) and is provided with a welding hole (10) for cooperating with an electrode column on a battery cell.

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