A laminated busbar for a battery module

Abstract

The utility model relates to a kind of battery module is with laminated busbar, belong to battery module is with laminated busbar technical field, including connection mainboard, the rear side fixed mounting of connection mainboard left face is used for the direct current negative pole groove block of connection, and connection mainboard left face is located in the front fixed mounting of direct current negative pole groove block is used for the direct current positive pole groove block of connection, and the top surface of connection mainboard is provided with several groups of connecting holes, the utility model in the process of using, using elastic structure can reverse push for the fastener such as bolt of fixed, and then can avoid device because of connection position loosening, leading to the problem of resistance increase, avoid because the problem of resistance increase and can produce a large amount of heat to accelerate the aging of device itself, avoid because heat is too large to cause the ignition of nearby insulating material, electrolyte leakage, even directly trigger adjacent battery monomer to occur the problem of thermal runaway, guarantee the use safety of device.

Description

Technical Field

[0001] This utility model relates to the technical field of stacked busbars for battery modules, specifically a stacked busbar for battery modules. Background Technology

[0002] Laminated busbars are multi-layered composite structural components in battery modules used for efficient conductivity. They are made of multiple layers of copper or aluminum conductor foil and insulating materials that are alternately laminated and pressed together. Their core function is to replace traditional cables and realize high-current connections between cells within the module and between cells and external interfaces. They feature low impedance, high current carrying capacity, good heat dissipation, and compact structure, which can improve the safety and integration of battery systems. They are widely used in battery modules in new energy vehicles, energy storage, and other fields.

[0003] During use, the stacked busbars for battery modules need to be fixed to the battery modules. The general method of fixing is to use the fixing holes on the stacked busbars and tighten them with bolts. However, the location where the stacked busbars for battery modules are used may be subject to mechanical vibration, which may lead to loosening of the connection between the battery module and the stacked busbars. When the connection of the stacked busbars for battery modules becomes loose, the actual contact area at the connection point may be reduced, and the contact surface pressure may be insufficient, which will lead to a significant increase in contact resistance. When current passes through the high-resistance connection point, it will generate a lot of heat. The high temperature will accelerate the aging, oxidation and degradation of the busbar itself. When the heat accumulates to a sufficiently high level, it may ignite nearby insulation materials, cause electrolyte leakage, or even directly trigger thermal runaway of adjacent battery cells, thereby affecting the overall safety of the battery module. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a stacked busbar for battery modules, which solves the problem of loose connections that may occur during the use of traditional devices, avoids device aging, and increases the safety of device use.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a stacked busbar for a battery module, comprising a connecting motherboard, wherein a DC negative electrode slot block for connection is fixedly installed on the rear side of the left side of the connecting motherboard, and a DC positive electrode slot block for connection is fixedly installed on the left side of the connecting motherboard in front of the DC negative electrode slot block, and a plurality of connection holes are provided on the top surface of the connecting motherboard, wherein an anti-slip component for anti-slip is fixedly installed on one side of the top surface of the connecting motherboard located at the plurality of connection holes; The anti-slip component includes a rubber pad fixedly installed on the top surface of the connecting motherboard, and a storage port for storage is opened on the top surface of the rubber pad on one side of the connecting hole. A compression cone for elastic compression is fixedly installed on the upper side of the inner wall of the storage port. A conical expansion cavity for expansion is opened on the inner wall of the compression cone, and a V-shaped support frame for support is fixedly installed on the upper and lower sides of the inner wall of the conical expansion cavity.

[0006] Furthermore, both ends of several of the rubber pads are rounded, and several storage ports are through-holes with stepped inner wall cross-sections, and the axial cross-section of the storage ports has a two-level broken line shape.

[0007] Furthermore, each group of connecting holes is configured to have two holes, and the connecting holes are circular.

[0008] Furthermore, some of the extrusion cones are rubber cone structures, and the inclination angle of the side wall of the extrusion cone is set to β, where 10°≤β≤30°.

[0009] Furthermore, some of the extrusion cones are configured to be thinner at the top and thicker at the bottom, and the thickness of the top of the extrusion cone is less than three times that of the bottom.

[0010] Furthermore, several S-shaped tension bars for increasing stretching are fixed to the surface of several extrusion conical cylinders, and the several S-shaped tension bars are equidistantly arranged on the periphery of the extrusion conical cylinders.

[0011] Furthermore, the inner walls of both the DC negative electrode slot and the DC positive electrode slot are threaded with screws for fastening, and the rod walls of the two screws are adjusted with disc spring washers for anti-slip.

[0012] Compared with the prior art, the present invention provides a laminated busbar for battery modules, which has the following advantages: 1. During use, the device utilizes an elastic structure to push the bolts and other fasteners used for fixing in the opposite direction, thereby avoiding the problem of increased resistance due to loose connections. This also prevents the device from generating a large amount of heat due to increased resistance, which would accelerate the aging of the device itself. Furthermore, it prevents the device from igniting nearby insulating materials, leaking electrolyte, or even directly triggering thermal runaway of adjacent battery cells due to excessive heat, thus ensuring the safety of the device. Attached Figure Description

[0013] Figure 1 This is a perspective view of the entire utility model; Figure 2 This is a perspective view of the anti-slip component of this utility model; Figure 3 This is a perspective view of the anti-slip component of this utility model; Figure 4This is a vertical sectional perspective view of the rubber pad of this utility model; Figure 5 This utility model Figure 4 Enlarged view of section A.

[0014] In the diagram: 1. Connecting motherboard; 2. DC negative terminal slot; 3. DC positive terminal slot; 4. Connecting hole; 5. Anti-slip component; 501. Rubber pad; 502. Storage port; 503. Extrusion conical cylinder; 5031. S-shaped pull bar; 504. Conical expansion cavity; 505. V-shaped support frame; 6. Screw; 7. Disc spring washer. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1 to 5 This embodiment of a battery module stacked busbar includes a connecting motherboard 1. The connecting motherboard 1 has the function of a stacked busbar, which is a mature existing technology. This application highlights the innovative structure and does not elaborate on the existing technology. A DC negative electrode slot 2 for connection is fixedly installed on the rear left side of the connecting motherboard 1. The inner walls of the DC negative electrode slot 2 and the DC positive electrode slot 3 are threaded with screws 6 for fastening. The rod walls of the two screws 6 are adjusted with disc spring washers 7 for anti-slip. A DC positive electrode slot 3 for connection is fixedly installed on the left side of the connecting motherboard 1 in front of the DC negative electrode slot 2. Several sets of connection holes 4 are opened on the top surface of the connecting motherboard 1. Each set of connection holes 4 has two holes, and the connection holes 4 are circular. An anti-slip component 5 for anti-slip is fixedly installed on one side of the top surface of the connecting motherboard 1 at the location of the several sets of connection holes 4. The anti-slip component 5 includes rubber pads 501 fixedly installed on the top surface of the connecting main board 1. Both ends of the rubber pads 501 are rounded, reducing stress concentration at sharp corners, improving fatigue resistance, and extending service life. The storage ports 502 are through-holes with stepped inner wall sections, and their axial cross-sections are two-stage broken lines. Storage ports 502 are located on one side of the connecting hole 4 on the top surface of the rubber pads 501. A compression cone 503 for elastic compression is fixedly installed on the upper side of the inner wall of the storage port 502. The compression cones 503 are made of rubber and have a conical structure. The side wall inclination angle is set to β, and 10°≤β≤30°. The setting of the surface inclination angle of the extrusion cone 503 is such that if the angle is less than 10°, the extrusion cone 503 will have insufficient deformation space, and its elasticity will be similar to that of a cylinder, with high stiffness but weak rebound. If the angle is greater than 30°, the extrusion cone 503 is prone to lateral instability when under pressure, resulting in structural buckling rather than elastic compression. The inner wall of the extrusion cone 503 is provided with a conical expansion cavity 504 for expansion. The setting of the conical expansion cavity 504 can ensure that the extrusion cone 503 is a hollow structure, thereby enhancing elasticity. Furthermore, the upper and lower sides of the inner wall of the conical expansion cavity 504 are fixedly installed with V-shaped support frames 505 for support. Several extrusion conical cylinders 503 are arranged with a thinner top and a thicker bottom, and the thickness of the top of the extrusion conical cylinder 503 is less than three times that of the bottom. The gradual change in thickness can avoid stress concentration caused by abrupt changes in the thickness of the extrusion conical cylinder 503, and achieve a smooth transition between the elastic deformation zone and the rigid support zone. Several S-shaped tie rods 5031 for increasing tensile strength are fixed on the surface of several extrusion conical cylinders 503, and the S-shaped tie rods 5031 are equally spaced on the periphery of the extrusion conical cylinder 503. Adding S-shaped tie rods 5031 to the outer wall of the extrusion conical cylinder 503 increases the radial bending stiffness and prevents the sidewall buckling and collapse.

[0017] The working principle of the above embodiments is as follows: When the device is in use, the DC negative terminal slot 2 and DC positive terminal slot 3, together with the screw 6 and disc spring washer 7, can ensure the stability of the connection between the device and the positive and negative terminal connecting wires. When the device is fixed to the battery module with bolts, the anti-slip component 5 will prevent loosening and other problems. During the bolt fixing process, the extrusion cone 503 inside the anti-slip component 5 is compressed. The extrusion cone 503 can ensure strong elasticity through its own material elasticity, the internal conical expansion cavity 504, and the V-shaped support frame 505 set on the inner wall of the conical expansion cavity 504. Thus, during the bolt tightening process, the elastic reaction force of the elastic structure can prevent bolt gap problems, thereby ensuring bolt fixing stability and avoiding the problem of loosening and increasing resistance between the main board 1 and the battery module, ensuring the safety of the device.

[0018] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.

Claims

1. A laminated busbar for a battery module, characterized in that: The system includes a connecting motherboard (1), on the rear left side of the connecting motherboard (1) a DC negative pole slot block (2) for connection is fixedly installed, and on the left side of the connecting motherboard (1) in front of the DC negative pole slot block (2) a DC positive pole slot block (3) for connection is fixedly installed, and the top surface of the connecting motherboard (1) is provided with several sets of connection holes (4), and the top surface of the connecting motherboard (1) is provided with an anti-slip component (5) for anti-slip on one side of the several sets of connection holes (4). The anti-slip component (5) includes a rubber pad (501) fixedly installed on the top surface of the connecting main board (1), and the top surface of the rubber pad (501) is provided with a storage port (502) for storage on one side of the connecting hole (4), and a compression cone (503) for elastic compression is fixedly installed on the upper side of the inner wall of the storage port (502), and a conical expansion cavity (504) for expansion is provided on the inner wall of the compression cone (503), and a V-shaped support frame (505) for support is fixedly installed on the upper and lower sides of the inner wall of the conical expansion cavity (504).

2. The stacked busbar for a battery module according to claim 1, characterized in that: Both ends of several of the rubber pads (501) are rounded, and several storage ports (502) are through-holes with stepped inner wall cross-sections, and the axial cross-section of the storage ports (502) is in the form of two-level broken lines.

3. The stacked busbar for a battery module according to claim 1, characterized in that: The number of connecting holes (4) in each group is two, and the connecting holes (4) are circular.

4. The stacked busbar for a battery module according to claim 1, characterized in that: Some of the extrusion cones (503) are cone structures made of rubber, and the inclination angle of the side wall of the extrusion cone (503) is set to β, where 10°≤β≤30°.

5. A stacked busbar for a battery module according to claim 1, characterized in that: Some of the extrusion cones (503) are configured to be thinner at the top and thicker at the bottom, and the thickness of the top of the extrusion cone (503) is less than three times the thickness of the bottom.

6. The stacked busbar for a battery module according to claim 1, characterized in that: Several S-shaped tie rods (5031) for increasing stretching are fixed on the surface of several extrusion cones (503), and the several S-shaped tie rods (5031) are equidistantly arranged on the periphery of the extrusion cones (503).

7. A stacked busbar for a battery module according to claim 1, characterized in that: The inner walls of the DC negative electrode slot (2) and the DC positive electrode slot (3) are threaded with screws (6) for fastening, and the rod walls of the two screws (6) are adjusted with disc spring washers (7) for anti-slip.

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