Integrated acquisition busbar

Abstract

The utility model discloses an 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, the conductive confluence metal sheet and the sensing chip are respectively connected with the output connecting terminal through at least one metal wire, the plurality of metal wires are laid on the surface, facing the upper base film, of the lower base film at intervals, and the conductive confluence metal sheet and the sensing chip are both arranged on the surface, facing the upper base film, of the lower base film; the upper base film is provided with a plurality of first avoidance through holes for the conductive bus metal sheets to be embedded and a plurality of second avoidance through holes for the sensing chips to be embedded. According to the utility model, the processing efficiency can be improved, the production cost can be saved, and the stability of signal transmission in the long-time use process can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile cables, in particular to an integrated acquisition 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 purpose of the utility model is to provide an integrated acquisition busbar, which can not only improve the processing efficiency and save production costs, but also ensure the stability of signal transmission during long-term use.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an 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, wherein the conductive busbars and sensor chips are each connected to the output connection terminal through at least one metal wire, and the plurality of metal wires are laid at intervals on the surface of the lower base film facing the upper base film, the conductive busbars and sensor chips 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 busbars and a plurality of second avoidance through holes for embedding the sensor chips.

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

[0008] 1. In the above scheme, the lower base film and the upper base film, the conductive bus metal sheet, the sensor chip and the metal wire are all bonded and connected by an adhesive layer.

[0009] 2. In the above solution, the bending part of the metal wire is set to be arc-shaped.

[0010] 3. In the above scheme, one end of a conductive metal sheet 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 extends to the outside of the lower base film 8 and the upper base film 9 and is provided with a welding hole for cooperating with the electrode column on the battery cell.

[0011] 4. In the above solution, the metal wire is a round copper wire.

[0012] 5. In the above solution, the diameter of the metal wire is 10μm~100μm.

[0013] 6. In the above solution, the output connection terminal is arranged outside the short side of the lower base film, and the ends of a plurality of metal wires connected to the output connection terminal are arranged at equal intervals in the width direction of the lower base film.

[0014] 7. In the above solution, the sensor chip is at least one of a temperature sensor chip and a voltage sensor chip.

[0015] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0016] The utility model integrates a collection busbar, wherein the conductive busbar metal sheet and the sensor chip are each connected to the output connection terminal through at least one metal wire, and a plurality of the metal wires are laid at intervals on the surface of the lower base film facing the upper base film, and the conductive busbar metal sheet 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 metal sheet and a plurality of second avoidance through holes for embedding the sensor chip, and the signal transmission between the conductive busbar metal sheet, the sensor chip and the output connection terminal is realized by using a metal wire encapsulated between two base films and having a consistent wire diameter, which can improve the processing efficiency and save the production cost, and can also ensure the stability of the signal transmission during long-term use; in addition, the bending part of the metal wire is arranged in an arc shape, which can improve the bending resistance of the metal wire and the whole, and further improve the stability of the signal transmission during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 This is a schematic diagram of the structure of the integrated data collection busbar of the utility model;

[0018] Attached Figure 2 For attachment Figure 1 Middle AA section view;

[0019] Attached Figure 3 This is a schematic diagram of the structure of the upper base membrane of the integrated collection busbar of the utility model;

[0020] Attached Figure 4 This is a schematic diagram of the structure of Example 2 of the utility model.

[0021] In the above figures: 1. Adhesive layer; 2. Metal wire; 3. Conductive bus metal sheet; 4. Conductive metal sheet; 5. Sensor chip; 6. Output connection terminal; 7. Welding hole; 8. Lower base film; 9. Upper base film; 10. First avoidance through hole; 11. Second avoidance through 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: An integrated data collection busbar comprises: a plurality of conductive bus metal sheets 3 and output connection terminals 6 for electrically connecting to battery cells, and also comprises: 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 bus metal sheets 3 and the sensor chips 5 are each connected to the output connection terminals 6 via at least one metal wire 2, and the plurality of metal wires 2 are laid at intervals on the surface of the lower base film 8 facing the upper base film 9, the conductive bus metal sheets 3 and the sensor chips 5 are both 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 bus metal sheets 3 and a plurality of second avoidance through holes 11 for embedding the sensor chips 5.

[0024] The base film can be any one of PET base film, PVC base film, PE base film, PBT base film or PI base film, preferably PET base film;

[0025] like Figure 2 As shown, the lower base film 8 and the upper base film 9, the conductive bus metal sheet 3, the sensor chip 5 and the metal wire 2 are all bonded and connected by an adhesive layer 1. The adhesive layer can be obtained by coating on the lower base film, and then the conductive bus metal and the sensor chip are mounted on the adhesive layer that has not been completely cured, and the metal wire is printed. Then, the metal wire is electrically connected with the conductive bus metal sheet or the sensor chip located above it by solder paste welding by laser welding, and finally the upper base film is covered and bonded to the other side of the printed metal wire;

[0026] like Figure 1As shown, 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 7 for matching with the electrode column on the battery cell;

[0027] The metal wire 2 is a round copper wire; the diameter of the metal wire 2 is 15 μm;

[0028] The sensor chip 5 is a temperature sensor chip.

[0029] Embodiment 2: An integrated data collection busbar comprises: a plurality of conductive bus metal sheets 3 and output connection terminals 6 for electrically connecting to battery cells, and also comprises: 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 bus metal sheets 3 and the sensor chips 5 are each connected to the output connection terminals 6 via at least one metal wire 2, and the plurality of metal wires 2 are laid at intervals on the surface of the lower base film 8 facing the upper base film 9, the conductive bus metal sheets 3 and the sensor chips 5 are both 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 bus metal sheets 3 and a plurality of second avoidance through holes 11 for embedding the sensor chips 5.

[0030] like Figure 4 As shown, the bending part of the metal wire 2 is set to be arc-shaped;

[0031] The metal wire 2 is a round copper wire; the diameter of the metal wire 2 is 75 μm;

[0032] The output connection terminal 6 is arranged outside the short side of the lower base film 8, and the ends of the plurality of metal wires 2 connected to the output connection terminal 6 are arranged at equal intervals in the width direction of the lower base film 8;

[0033] A part of the sensor chips 5 is a temperature sensor chip, and another part is a voltage sensor chip.

[0034] Compared with the prior art that uses FPC to obtain metal wires and fixed routing shapes through chemical etching, and uses FFC to obtain millimeter-level aluminum metal wires or tinned metal wires with fixed routing shapes through processes such as embossing, the present application uses nano-level copper wires to be laid through printing, and no material waste or pollution will be generated during the processing process. Any routing shape can be obtained by setting the printing route without increasing any cost, especially the bends can transition more naturally and avoid excessive stress concentration, so as to ensure the stability and consistency of signal transmission during the deformation caused by thermal expansion and contraction of the battery during long-term use, thereby obtaining a product with better overall flexibility, stability and bending resistance, and the process is simple, the processing cost is low, and the processing cost will not increase significantly with the increase in product size.

[0035] When the above-mentioned integrated acquisition busbar is used, a metal wire with a consistent wire diameter and encapsulated between two base films is used to realize signal transmission between the conductive bus metal sheet, the sensor chip and the output connection terminal, which can not only improve the processing efficiency and save production costs, but also ensure the stability of signal transmission during long-term use; in addition, the bending part of the metal wire is set to an arc shape, which can improve the bending resistance of the metal wire and the whole, and further improve the stability of signal transmission during long-term use.

[0036] 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. An integrated acquisition 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 terminals (6) via at least one metal wire (2), and the plurality of metal wires (2) are laid at intervals on the surface of the lower base film (8) facing the upper base film (9), and the conductive busbar metal sheets (3) and the sensor chips (5) are both 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 sheets (3) and a plurality of second avoidance through holes (11) for embedding the sensor chips (5).

2. The integrated data acquisition 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 metal wire (2) via an adhesive layer (1).

3. The integrated data acquisition busbar according to claim 1, characterized in that: The bending part of the metal wire (2) is arranged to be in an arc shape.

4. The integrated data acquisition 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 (7) for cooperating with an electrode column on a battery cell.

5. The integrated data acquisition busbar according to claim 1, characterized in that: The metal wire (2) is a round copper wire.

6. The integrated data acquisition busbar according to claim 5, characterized in that: The diameter of the metal wire (2) is 10 μm to 100 μm.

7. The integrated data acquisition busbar according to claim 1, characterized in that: The output connection terminal (6) is arranged outside the short side of the lower base film (8), and one end of a plurality of metal wires (2) connected to the output connection terminal (6) is arranged at equal intervals in the width direction of the lower base film (8).

8. The integrated data acquisition 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.

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