Battery module collection busbar

Abstract

The utility model discloses a battery module acquisition busbar, which comprises a plurality of conductive confluence metal sheets and output connection terminals which are electrically connected with battery cells, and further comprises a plurality of sensing chips for sensing the states of the battery cells, the conductive confluence metal sheet and the sensing chip are respectively connected with the output connecting terminal through at least one signal transmission wire, the plurality of signal transmission wires are laid on a base material layer, and one side surface of the base material layer is connected with the signal transmission wires through an adhesive layer in an adhesive mode. The signal transmission wire further comprises a metal wire and an insulating layer wrapping the outer side of the metal wire. According to the utility model, the processing efficiency can be improved, the production cost can be saved, the mutual interference between adjacent signal transmission wires can be effectively avoided, and the transmission stability of all paths of acquisition signals can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile cables, in particular to a battery module 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 purpose of the utility model is to provide a battery module collection busbar, which can not only improve processing efficiency and save production costs, but also effectively avoid mutual interference between similar signal transmission wires, and improve the stability and reliability of transmission of each collection signal.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a battery module collection busbar, including: a plurality of conductive bus metal sheets and output connection terminals for electrically connecting to battery cells, and also including a plurality of sensor chips for sensing the status of battery cells, wherein the conductive bus metal sheets 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 a substrate layer, and one side surface of the substrate layer is bonded to the signal transmission wire through an adhesive layer, and the signal transmission wire further includes a metal wire and an insulating layer coated on the outside of the metal wire.

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

[0008] 1. In the above solution, the metal wire is a copper wire or a tinned copper wire.

[0009] 2. In the above solution, the metal wire is a round wire.

[0010] 3. In the above solution, the diameter of the metal wire is 10μm~100μm.

[0011] 4. In the above solution, the adhesive layer is arranged outside the insulating layer of the signal transmission wire.

[0012] 5. In the above solution, the adhesive layer is coated on the surface of the substrate layer.

[0013] 6. In the above solution, the conductive bus metal sheet and the sensor chip are both bonded and connected to the substrate layer through an adhesive layer.

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

[0015] 8. In the above solution, a plurality of positioning holes are provided on the substrate layer.

[0016] 9. In the above solution, the four positioning holes are respectively arranged at two ends of the substrate layer.

[0017] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0018] The utility model provides a battery module collection busbar, wherein the conductive busbar metal sheet and the sensor chip are each connected to the output connection terminal via at least one signal transmission wire, and a plurality of the signal transmission wires are laid on a substrate layer, and one side surface of the substrate layer is bonded to the signal transmission wire via an adhesive layer, and the signal transmission wire further comprises a metal wire and an insulating layer coated on the outside of the metal wire. The signal transmission wire with a uniform wire diameter and an insulating layer is used to realize signal transmission between the conductive busbar metal sheet, the sensor chip and the output connection terminal, which can not only improve processing efficiency and save production costs, but also effectively avoid mutual interference between adjacent signal transmission wires, improve the stability and reliability of transmission of each collection signal, and also improve the overall flexibility and bending resistance, which is beneficial to improving the stability of the connection with the battery cell, and further improves the stability of battery signal collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 This is a schematic diagram of the structure of the busbar of the battery module of the utility model;

[0020] Attached Figure 2 For attachment Figure 1 Middle AA section view;

[0021] Attached Figure 3 It is a partial structural cross-sectional view of an implementation mode of the utility model;

[0022] Attached Figure 4 It is a partial structural cross-sectional view of another embodiment of the utility model.

[0023] In the above figures: 1, adhesive layer; 2, signal transmission wire; 21, metal wire; 22, insulation layer; 3, conductive bus metal sheet; 4, substrate layer; 5, sensor chip; 6, output connection terminal; 7, positioning hole. DETAILED DESCRIPTION

[0024] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.

[0025] Embodiment 1: A battery module collection busbar comprises: a plurality of conductive bus 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 bus 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 a substrate layer 4, and a side surface of the substrate layer 4 is bonded to the signal transmission wire 2 via an adhesive layer 1, and 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.

[0026] The substrate layer can be any one of a PET substrate layer, a PVC substrate layer, a PE substrate layer, a PBT substrate layer or a PI substrate layer, preferably a PET substrate layer;

[0027] The metal wire 21 is a round copper wire; the diameter of the metal wire 21 is 20 μm;

[0028] like Figure 3 As shown, the adhesive layer 1 is coated on the surface of the substrate layer 4; the conductive bus metal sheet 3 and the sensor chip 5 are both bonded and connected to the substrate layer 4 through the adhesive layer 1. The adhesive layer can be obtained by coating on the substrate layer, and then the signal transmission wire is printed on the uncured adhesive layer, and the conductive bus metal sheet and the sensor chip are mounted. Then, the signal transmission wire is connected to the conductive bus metal sheet or the sensor chip located above it by solder paste welding by laser welding to achieve electrical conduction;

[0029] The sensor chip 5 is a temperature sensor chip and a voltage sensor chip.

[0030] Embodiment 2: A battery module collection busbar comprises: a plurality of conductive bus 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 bus 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 a substrate layer 4, and a side surface of the substrate layer 4 is bonded to the signal transmission wire 2 via an adhesive layer 1, and 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.

[0031] The metal wire 21 is a tinned copper wire;

[0032] The metal wire 21 is a round wire; the diameter of the metal wire 21 is 80 μm;

[0033] like Figure 4 As shown, the adhesive layer 1 is arranged outside the insulating layer 22 of the signal transmission wire 2, and the signal transmission wire to be printed is first passed through the adhesive and then printed on the substrate layer, thereby forming an adhesive layer to achieve connection and fixation between the substrate layer and the signal transmission wire;

[0034] The sensor chip 5 is a temperature sensor chip;

[0035] like Figure 1 As shown, a plurality of positioning holes 7 are provided on the substrate layer 4; the four positioning holes 7 are respectively arranged at both ends of the substrate layer 4, which can cooperate with the positioning posts on the battery to further improve the stability of the connection between the busbar as a whole and the battery, thereby ensuring the stability of the battery signal collection by each conductive bus metal sheet and the sensor chip.

[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 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, 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 battery module collection busbar is used, a signal transmission wire with a consistent wire diameter and an insulating layer is used to realize signal transmission between the conductive bus metal sheet, the sensor chip and the output connection terminal. This can not only improve processing efficiency and save production costs, but also effectively avoid mutual interference between similar signal transmission wires, improve the stability and reliability of each channel of collection signal transmission, and also improve the overall flexibility and bending resistance, which is beneficial to improve the stability of the connection with the battery cell, thereby improving the stability of battery signal collection.

[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 battery module 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 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 signal transmission wire (2), wherein the plurality of signal transmission wires (2) are laid on a substrate layer (4), wherein a surface of one side of the substrate layer (4) is bonded to the signal transmission wires (2) via an adhesive layer (1), and the signal transmission wires (2) further include a metal wire (21) and an insulating layer (22) covering the outside of the metal wire (21).

2. The battery module collection busbar according to claim 1, characterized in that: The metal wire (21) is a copper wire or a tinned copper wire.

3. The battery module collection busbar according to claim 1 or 2, characterized in that: The metal wire (21) is a round wire.

4. The battery module collection busbar according to claim 3, characterized in that: The diameter of the metal wire (21) is 10 μm to 100 μm.

5. The battery module collection busbar according to claim 1, characterized in that: The adhesive layer (1) is arranged outside the insulating layer (22) of the signal transmission wire (2).

6. The battery module collection busbar according to claim 1, characterized in that: The adhesive layer (1) is coated on the surface of the substrate layer (4).

7. The battery module collection busbar according to claim 6, characterized in that: The conductive bus metal sheet (3) and the sensor chip (5) are both bonded and connected to the substrate layer (4) via the adhesive layer (1).

8. The battery module 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.

9. The battery module collection busbar according to claim 1, characterized in that: A plurality of positioning holes (7) are provided on the base material layer (4).

10. The battery module collection busbar according to claim 9, characterized in that: The four positioning holes (7) are respectively arranged at two ends of the base material layer (4).

Images