Lightweight composite battery busbar

Abstract

The utility model discloses a lightweight composite battery busbar, which comprises an acquisition wire, an aluminum bar, a plastic bracket and a battery cell assembly, and the acquisition wire, the aluminum bar, the plastic bracket and the battery cell assembly are sequentially arranged from top to bottom in a structural arrangement sequence, according to the composite battery busbar, the combination mode of the acquisition lines, the aluminum bar and the plastic bracket is optimized, so that the assembly process of the assembly is simplified. According to the composite battery busbar, the utilization rate of materials is improved through the accurate design of the connection area of the aluminum bar and the battery cell assembly, meanwhile, the collection wire of the composite battery busbar is connected with the top of the aluminum bar through the pins on the two sides, excessive constraint is avoided, the collection assembly is allowed to flexibly adapt to thermal expansion and volume changes of the battery cell in the battery operation process, and the collection efficiency is improved. The problem of mechanical stress caused by thermal expansion of the battery is solved, the reliability of the whole system is remarkably improved, the service life of the whole system is remarkably prolonged, and fatigue and abrasion caused by mechanical stress can be effectively reduced in a high-current environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the integrated busbar field, concretely is a kind of lightweight composite battery busbar. BACKGROUND

[0002] With the rapid development of electric vehicles, power storage systems and other new energy equipment, the importance of battery technology as the core of energy is increasingly prominent. In order to improve the energy density of the battery pack, reduce the system weight and improve the assembly efficiency of the battery, the design and manufacturing of the battery busbar is one of the key technologies. The traditional battery busbar usually uses copper conductor and rigid structure, which not only increases the overall weight, but also leads to lack of flexibility in structural design, which cannot meet the requirements of lightweight, miniaturization and high efficiency in modern applications.

[0003] After searching, a kind of lightweight composite battery busbar

application number: 202220339024.X, publication number: CN217239686U

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a kind of lightweight composite battery busbar.

[0005] A kind of lightweight composite battery busbar, including acquisition line, aluminum bar, plastic support and electric core component, the structural arrangement order of the acquisition line, aluminum bar, plastic support and electric core component from top to bottom is acquisition line, aluminum bar, plastic support and electric core in turn;

[0006] The acquisition line is arranged along the top of aluminum bar and fixedly connected therewith;

[0007] The aluminum bar is a metal connecting unit arranged between two electric cores, for connecting the positive and negative poles of adjacent electric cores, to realize electrical conduction;

[0008] The plastic support is arranged between the aluminum bar and the electric core component.

[0009] Preferably, the acquisition line is provided with wire harness pin on both sides, and the wire harness pin is connected to the top of the aluminum bar.

[0010] Through the above technical scheme, the acquisition line can collect the electrical signals between the aluminum bar and the electric core, including voltage, current and other key parameters, and transmit the signals to other monitoring equipment, so as to realize real-time monitoring and data recording of the battery pack operation state.

[0011] Preferably, the length direction of the collection line is parallel to the arrangement direction of the battery cells, and the length of the collection line matches the arrangement length of the battery cells.

[0012] By the above technical solution, the arrangement direction of the collection line can be adapted to the arrangement of the battery cells, minimizing the electrical connection path, thereby reducing the impedance and electromagnetic interference in the signal transmission process. The parallel design of the collection line along the arrangement direction of the battery cells helps to optimize the space utilization of the assembly and ensure the stability and consistency of the electrical connection.

[0013] Preferably, the aluminum bar is arranged between two battery cells, one end of the bottom of the aluminum bar is in contact with the positive electrode of one battery cell, and the other end of the bottom is in contact with the negative electrode of the other battery cell, so as to realize the electrical connection between the two battery cells.

[0014] By the above technical solution, the structure of the aluminum bar not only realizes efficient electrical connection between the battery cells, but also keeps the electrical path shortest, effectively reducing the resistance and conduction loss. This arrangement optimizes the overall modular design of the battery pack, helping to improve the assembly efficiency and electrical performance consistency of the battery system.

[0015] Preferably, the middle part of the aluminum bar is provided with a bend corresponding to the middle gap of the battery cell assembly.

[0016] By the above technical solution, the bend structure in the middle part of the aluminum bar can be adapted to the middle gap of the battery cell assembly, thereby realizing precise assembly and reliable positioning of the aluminum bar and the battery cell assembly. This design not only effectively avoids irregular contact or interference between the aluminum bar and the battery cell assembly, but also improves the stability and compactness of the connection structure.

[0017] Preferably, the arrangement of the battery cells is in a row-column matrix.

[0018] By the above technical solution, the row-column matrix arrangement can realize efficient layout of the battery cells in limited space, maximizing the space utilization of the battery pack. This arrangement makes the connection of the battery cells more regular, facilitating the unified design and assembly of the aluminum bar and other connecting components. At the same time, the matrix arrangement can also optimize the heat dissipation path of the battery pack, helping to maintain the temperature uniformity of the battery cells during operation, thereby further improving the stability and consistency of the battery system.

[0019] Preferably, the plastic support is provided with a mounting hole, and an NTC assembly can be arranged in the mounting hole.

[0020] By the above technical solution, the mounting hole on the plastic support provides a special space for fixing the NTC assembly, thereby ensuring that the NTC assembly maintains a stable contact relationship with the battery cell assembly.

[0021] Preferably, an insulating film can be laid between the aluminum bar and the battery cell assembly, and the insulating film is provided with a reserved hole corresponding to the connection point of the aluminum bar and the battery cell assembly.

[0022] Through the above technical solution, the setting of the insulating film can form reliable electrical isolation between the aluminum bar and the battery cell assembly, avoiding the risk of short circuit caused by direct metal contact. The reserved hole provided on the insulating film can avoid the connection point of the aluminum bar and the battery cell assembly, thereby ensuring the normal electrical connection.

[0023] Compared with the prior art, the utility model has the following advantages:

[0024] 1. The combination mode of the collection line, the aluminum bar and the plastic support of the composite battery busbar is optimized, the assembly assembly process is simplified, the complex welding and fixing steps are reduced, thereby the overall production process is shortened, and the production efficiency is improved. Through the accurate design of the connection area of the aluminum bar and the battery cell assembly and the detail optimization of the reserved hole of the insulating film, the waste of materials is reduced, and the utilization rate of materials is improved.

[0025] 2. The collection line of the composite battery busbar is connected with the top of the aluminum bar through the two side pins, which avoids excessive constraint and allows the collection assembly to flexibly adapt to the thermal expansion and volume change of the battery cell during the operation of the battery. Not only the mechanical stress problem caused by the thermal expansion of the battery is solved, but also the reliability and service life of the whole system are significantly improved, and the fatigue and wear caused by mechanical stress can be effectively reduced in a high current environment. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 is the front view schematic diagram of the utility model;

[0027] Fig. 2 is the three-dimensional schematic diagram of the utility model;

[0028] Fig. 3 is the explosion diagram schematic diagram of the utility model.

[0029] In the drawing: 1, collection line; 2, aluminum bar; 3, plastic support; 4, battery cell assembly. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0031] Please refer to Figs. 1 to 3 , the utility model provides a kind of technical scheme:

[0032] A light composite battery busbar, comprising a collection line, an aluminum bar, a plastic support and a cell assembly, the structural arrangement order of the collection line, the aluminum bar, the plastic support and the cell assembly from top to bottom is collection line, aluminum bar, plastic support and cell; the collection line is arranged along the top of the aluminum bar and fixedly connected therewith; the aluminum bar is a metal connecting unit arranged between two cells, used for connecting the positive and negative poles of adjacent cells to realize electrical conduction; the plastic support is arranged between the aluminum bar and the cell assembly.

[0033] Specifically, the collection line is provided with line bar pins on both sides, which are connected to the top of the aluminum bar. The connection of the collection line and the aluminum bar not only realizes efficient electrical conduction, but also can be used to collect the electrical signals between the aluminum bar and the cell, ensuring that the electrical state in the battery module can be accurately monitored and transmitted. This design further improves the signal collection accuracy and reliability of the battery module on the basis of ensuring the lightness of the busbar, and is suitable for application scenarios with high requirements for lightness, high efficiency and signal monitoring, such as new energy vehicle power battery modules and energy storage equipment.

[0034] Specifically, the length direction of the collection line is parallel to the arrangement direction of the cells, and the length of the collection line matches the arrangement length of the cells. The parallel design of the length direction of the collection line and the arrangement direction of the cells can ensure that the collection line covers all the cell connection points, thereby realizing comprehensive collection of cell signals. The length of the collection line matches the arrangement length of the cells, effectively reducing the waste of excess materials, and making the overall structure more compact and orderly. This design not only optimizes the space utilization, but also improves the installation efficiency, and is suitable for the rapid assembly demand of large-scale battery modules.

[0035] Specifically, the aluminum bar is arranged between two cells, one end of the bottom of the aluminum bar is in contact with the positive pole of one cell, and the other end of the bottom is in contact with the negative pole of the other cell, to realize the electrical connection between the two cells. This design uses the aluminum bar as a conductor, optimizes the electrical connection mode inside the battery module, ensures efficient current transmission between adjacent cells, and reduces the contact resistance of the connection part, thereby improving the overall battery performance. The aluminum bar not only realizes the electrical connection between the two cells, but also provides light structure support for the entire module. The aluminum bar not only ensures the connection strength and conductivity, but also adapts to complex working conditions such as vibration, thermal expansion and cold contraction, providing technical support for the stable operation of the battery module in high-performance application scenarios such as new energy vehicles and energy storage systems.

[0036] Specifically, the middle part of the aluminum bar is provided with a bending corresponding to the middle gap of the battery cell assembly. This bending structure not only ensures that the aluminum bar closely fits the battery cell assembly, but also effectively avoids installation difficulties caused by arrangement errors or size deviations of the battery cell assembly during installation, and improves the overall mechanical stability of the battery module, so that the aluminum bar can maintain stable electrical connection performance in complex use conditions. In addition, this bending design also has a certain buffering effect, which can absorb part of the mechanical stress when the battery cell assembly is displaced due to thermal expansion and contraction or external vibration, thereby reducing the risk of damage to the connection point. This design concept fully considers the dynamic characteristics of the battery module, providing reliable support for the long-term operation of the battery system in high-frequency vibration or high-temperature environment.

[0037] Specifically, the battery cell arrangement is in a row-column matrix arrangement, which has significant advantages in space utilization and electrical connection. The row-column matrix arrangement can make the positive and negative connection point positions of the battery cells distributed regularly and uniformly, facilitating the accurate arrangement of the aluminum bar and the collection line, thereby realizing efficient electrical connection and signal collection, and at the same time making the battery cell assembly have high compactness and modularity. The positive electrode of each row of battery cells and the negative electrode of the next row of battery cells can be directly connected by the aluminum bar, and the collection line can also be wired parallel to the battery cell arrangement direction, ensuring that the connection path of the entire module is the shortest, thereby effectively reducing the internal resistance and improving the output performance of the battery pack. In addition, the regular layout of the row-column matrix facilitates the design of standardized plastic supports and insulation film openings, realizing rapid production and assembly.

[0038] Specifically, the plastic support is provided with a mounting hole, and an NTC assembly can be arranged in the mounting hole. The size and shape of the mounting hole are adapted to the NTC assembly, which can firmly accommodate the NTC assembly. After the NTC assembly is embedded in the plastic support through the mounting hole, it is in close contact with the surface of the battery cell, which can monitor the temperature change of the battery cell in real time and ensure the accuracy of temperature data collection.

[0039] Specifically, an insulation film can be laid between the aluminum bar and the battery cell assembly, and the insulation film is provided with a reserved hole corresponding to the connection point of the aluminum bar and the battery cell assembly. The insulation film is mainly used to isolate the direct contact between the aluminum bar and the battery cell assembly, preventing short circuit risk caused by battery cell assembly errors or external impact, thereby improving the electrical safety of the battery module.

[0040] In the description of the utility model, it is understood that the orientation or position relation indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0041] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0042] The above is only the preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, and it should be covered in the protection scope of the utility model.

Claims

1. A light-weight composite battery busbar, comprising a collection wire (1), an aluminum bar (2), a plastic support (3) and a cell assembly (4), wherein the collection wire (1), the aluminum bar (2), the plastic support (3) and the cell assembly (4) are arranged in the order of the collection wire (1), the aluminum bar (2), the plastic support (3) and the cell assembly (4) from top to bottom. The collection wire (1) is arranged along the top of the aluminum bar (2) and fixedly connected thereto. The aluminum bar (2) is a metal connecting unit arranged between two cells and used for connecting the positive and negative poles of adjacent cells to realize electrical conduction. The aluminum bar (2) is provided with the plastic support (3) between the aluminum bar (2) and the cell assembly (4).

2. The light-weight composite busbar of claim 1, wherein: The collection wire (1) is provided with busbar pins on both sides, and the busbar pins are connected to the top of the aluminum bar (2).

3. The light-weight composite busbar of claim 1, wherein: The length direction of the collection wire (1) is parallel to the arrangement direction of the cells, and the length of the collection wire (1) matches the arrangement length of the cells.

4. The light-weight composite busbar of claim 1, wherein: The aluminum bar (2) is arranged between two cells, one end of the bottom of the aluminum bar (2) is in contact with the positive pole of one cell, and the other end of the bottom of the aluminum bar (2) is in contact with the negative pole of the other cell, so as to realize the electrical connection between the two cells.

5. The light-weight composite busbar of claim 1, wherein: The middle part of the aluminum bar (2) is provided with a bend corresponding to the middle gap of the cell assembly.

6. The light-weight composite busbar of claim 1, wherein: The cell arrangement mode is a row-column matrix arrangement.

7. The light-weight composite busbar of claim 1, wherein: The plastic support (3) is provided with a mounting hole, and an NTC assembly can be arranged in the mounting hole.

8. The light-weight composite busbar of claim 1, wherein: An insulating film can be laid between the aluminum bar (2) and the cell assembly (4), the insulating film is provided with a reserved hole, and the position of the reserved hole corresponds to the connection point of the aluminum bar (2) and the cell assembly (4).

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