A protection plate integrated with an aluminum pile head

Abstract

The utility model relates to a kind of integrated aluminum pile head protection plate, relate to battery technology field, and the protection plate includes PCB board, and aluminum row is welded on PCB board;Wherein, aluminum row is all provided with clamp jaw, and the insertion hole is set on PCB board corresponding clamp jaw, clamp jaw is inserted in insertion hole and is integrated structure by welding, and part aluminum row is provided with pile head.The utility model welds aluminum row on protection plate, reduces the risk that battery pack occurs thermal runaway due to the loosening of bolt because of vibration occurs torque attenuation, and bolt installation process is saved, and failure risk is reduced, and production cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to a protective plate for an integrated aluminum pin header. Background Technology

[0002] Sodium-ion starting batteries are rechargeable batteries that use sodium ions as charge carriers. They store and release electrical energy through the insertion and extraction of sodium ions within the battery. Compared to traditional lead-acid or lithium-ion batteries, sodium-ion batteries have lower costs and more abundant raw material sources, giving them a significant advantage, especially in large-scale production and application. Sodium-ion starting batteries are commonly used in vehicles, machinery, and other applications requiring high-power starting, providing a strong current for a short time to meet the instantaneous energy demand during startup.

[0003] Currently, protection boards typically come with press-fit screws, and the output aluminum busbars or wires are fixed to the protection board with bolts. However, this existing bolted connection method for fixing the output electrodes to the protection board is prone to loosening under vibration conditions, leading to torque attenuation, increased contact resistance, severe overheating, and even thermal runaway of the battery pack. Furthermore, the existing bolted connection method requires high precision in torque control during production line assembly, increases assembly steps and failure risks, and results in high manufacturing costs. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model proposes a protective plate for integrated aluminum pile heads, which eliminates the bolt installation process, reduces the risk of failure, and lowers production costs.

[0005] The technical solution adopted in this utility model is:

[0006] A protective plate for an integrated aluminum busbar head includes a PCB board on which aluminum busbars are welded.

[0007] Each of the aluminum busbars is equipped with a clamp, and the PCB board is provided with a corresponding insertion hole for the clamp. The clamp is inserted into the insertion hole and then welded into an integral structure. Some of the aluminum busbars are provided with a post.

[0008] Furthermore, the aluminum busbar includes a P+ aluminum busbar and a P- aluminum busbar, and the P+ aluminum busbar and the P- aluminum busbar are respectively welded with pile heads;

[0009] The aluminum busbar also includes B+ aluminum busbar and B- aluminum busbar, and the B+ aluminum busbar and B- aluminum busbar are provided with waist-shaped through holes for electrical connection and fixation with the aluminum busbar on the cell side.

[0010] Furthermore, the gripper has a concave-convex structure.

[0011] Furthermore, the PCB board is provided with mating positioning holes for positioning and engaging with the tab bracket. The mating positioning holes are fixedly connected to the connecting holes on the tab bracket by plastic clips.

[0012] Furthermore, the plastic buckle is provided with an annular protrusion with at least one step.

[0013] Furthermore, the radius of the plurality of annular protrusions increases sequentially from the cap end to the tip of the plastic buckle.

[0014] Furthermore, the annular protrusion is positioned towards the cap end of the plastic buckle, and at least one notch is provided on its periphery. The notch is used to release the amount of compression deformation during assembly, facilitating assembly.

[0015] Furthermore, the PCB board is also provided with PCB board fixing holes, soldering positioning holes, and cable tie fixing holes.

[0016] Furthermore, the PCB board is equipped with several connectors for acquiring cell voltage and transmitting signals.

[0017] Furthermore, the pile head is provided with a high-precision fine thread for cooperating with the nut to fix it to the outer shell, and the bottom of the pile head has a square structure.

[0018] The beneficial effects of this utility model are:

[0019] 1. Welding the aluminum busbars to the protective plate reduces the risk of bolts loosening and falling off due to torque decay caused by vibration, thus preventing thermal runaway of the battery pack;

[0020] 2. It can eliminate the bolt installation process, reduce the risk of production line failure, and reduce production time and personnel, thereby reducing overall costs. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a top view of the structure of this utility model;

[0023] Figure 3 This is a partial structural schematic diagram of the aluminum busbar of this utility model;

[0024] Figure 4 This is a three-dimensional structural diagram of the plastic buckle of this utility model;

[0025] Figure 5 This is a bottom-view three-dimensional structural diagram of the plastic buckle of this utility model;

[0026] Figure 6This is a schematic diagram showing the connection between the plastic buckle, the positioning hole, and the electrode bracket of this utility model.

[0027] In the diagram: 1. PCB board; 2. P+ aluminum busbar; 3. P- aluminum busbar; 4. B+ aluminum busbar; 5. B- aluminum busbar; 6. Pile head; 7. Connector; 8. Waist-shaped through hole; 9. Mating positioning hole; 10. Welding positioning hole; 11. Cable tie fixing hole; 12. PCB board fixing hole; 13. Clamp; 14. Plastic buckle; 15. Insertion hole; 16. Annular protrusion; 17. Notch; 18. Boss column. Detailed Implementation

[0028] The present invention will be further described below with reference to specific embodiments, but the present invention is not limited to these specific embodiments. Those skilled in the art should recognize that the present invention covers all alternatives, improvements and equivalents that may be included within the scope of the claims.

[0029] Terminology Explanation:

[0030] PCB: Circuit board;

[0031] B+ / B-: Battery terminal circuit interface;

[0032] P+ / P-: Vehicle-side circuit interface.

[0033] See Figures 1-5 This embodiment provides a protective plate for an integrated aluminum busbar head, including a PCB board 1 on which aluminum busbars are welded. Specifically, each aluminum busbar is provided with a clamp 13, and the PCB board 1 is provided with a corresponding insertion hole 15. The clamp 13 is inserted into the insertion hole 15 and then welded into an integral structure. Some aluminum busbars are provided with head. The clamp 13 has a concave-convex structure.

[0034] For example, the aluminum busbar and PCB board 1 are preferably welded using wave soldering. Wave soldering is suitable for automated batch welding, allowing the entire board to be completed in one pass, making it ideal for large-scale, standardized production and suitable for the actual welding conditions of PCB board 1 and aluminum busbar. Furthermore, the convex-concave structure of the gripper 13 is preferably a continuous square wave structure, specifically consisting of at least two protrusions with a notch between two adjacent protrusions to form the gripper 13; even further, the aforementioned gripper 13 can be provided on all contour edges of the contact portion between the aluminum busbar and PCB board 1.

[0035] In this embodiment, the aluminum busbar is made of AL1060H24, which has excellent electrical conductivity and high mechanical strength. The aluminum busbar includes P+ aluminum busbar 2 and P- aluminum busbar 3, and each of P+ aluminum busbar 2 and P- aluminum busbar 3 is welded with a pile head 6. Through welding (preferably laser welding) process, the risk of failure caused by loose bolt connections can be effectively reduced.

[0036] This embodiment also includes B+ aluminum busbar 4 and B- aluminum busbar 5, which are provided with oblong through holes 8 for electrical connection and fixation with the aluminum busbar on the battery cell side. Specifically, B+ aluminum busbar 4 and B- aluminum busbar 5 are electrically connected and fixed to the aluminum busbar on the battery cell side by anti-loosening bolts to absorb incoming material and assembly errors.

[0037] In this embodiment, the PCB board 1 is provided with a mating positioning hole 9 for positioning and engaging with the tab bracket. The mating positioning hole 9 is fixedly connected to the connecting hole on the tab bracket by a plastic clip 14. Figure 6 As shown. The plastic clip 14 is a T-shaped clip including an end cap and a post. The post has an annular protrusion 16 with at least one step. The radius of the multiple annular protrusions 16 increases sequentially from the cap end to the tip of the plastic clip 14. The annular protrusion 16 protrudes towards the cap end of the plastic clip 14, and at least one notch 17 is provided on its periphery. In this embodiment, notches 17 are provided on opposite sides of the annular protrusion 16. The notches 17 are used to release the amount of compression deformation during compression assembly, which facilitates assembly. The PCB board 1 is connected and fixed to the main support or positioning post (i.e., boss post 18) on the tab bracket by the plastic clip 14. The operation is simple and the PCB board 1 can be fixed without bolts.

[0038] In the above description, the buckle can be any deformable buckle with a certain degree of deformation, among which the plastic buckle 14 is the best. Taking the first-level annular protrusion 16 as an example, the annular protrusion 16 is a regular columnar structure. The column hole in the middle of the main column or positioning column is provided with a step. After the column of the plastic buckle 14 passes through the PCB board 1 and is inserted into the column hole, the annular protrusion 16 deforms inward. When the annular protrusion 16 reaches the step, it unfolds and fastens to form a positioning. The end cap of the plastic buckle 14 presses against the PCB board 1.

[0039] Similarly, in the above structure with 16 multi-level annular protrusions and progressively increasing radii, the steps of the column holes are also multi-level, and the radii of the multi-level holes also increase progressively from top to bottom, thus completing a multi-level locking mechanism.

[0040] Furthermore, the aforementioned annular protrusion 16, which is a protrusion at the cap end of the plastic buckle 14, can be interpreted as having an overall frustum structure. This annular protrusion 16 forms an oblique contact with the step of the post hole, increasing the difficulty for the plastic buckle 14 to exit the post hole and improving the reliability of the locking position.

[0041] In this embodiment, the PCB board 1 is also provided with PCB board fixing holes 12, welding positioning holes 10, and cable tie fixing holes 11. The welding positioning holes 10 are diagonally distributed, which is beneficial for visual positioning during aluminum busbar welding.

[0042] In this embodiment, the PCB board 1 is equipped with several connectors 7 for acquiring and transmitting cell voltage signals. Together with the protection board, it performs real-time monitoring of cell voltage and temperature, protecting cell safety and thus ensuring the safety of the user's life and property during use.

[0043] In this embodiment, the pile head 6 is provided with a high-precision fine thread for engaging with a nut to fix it to the outer shell. The bottom of the pile head 6 has a square structure, which can effectively prevent the pile head from rotating. The pile head 6 is made of AL6063-T5 material, which provides sufficient strength and can be matched with the vehicle end interface for high current transmission.

[0044] This invention welds the aluminum busbar to the protective plate, reducing the risk of bolts loosening and falling off due to torque decay caused by vibration, which could lead to thermal runaway of the battery pack. It can also eliminate the bolt installation process, reduce the risk of production line failure, and reduce production time and personnel, thereby reducing overall costs.

[0045] It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the scope of protection of this utility model.

Claims

1. A protective plate for integrated aluminum pile heads, comprising a PCB board (1), characterized in that: An aluminum busbar is soldered onto the PCB board (1); Each of the aluminum busbars is provided with a clamp (13), and the PCB board (1) is provided with a corresponding insertion hole (15). The clamp (13) is inserted into the insertion hole (15) and then welded into an integral structure. Some of the aluminum busbars are provided with a post head (6).

2. The protective plate for the integrated aluminum pile head according to claim 1, characterized in that: The aluminum busbar includes a P+ aluminum busbar (2) and a P- aluminum busbar (3), and the P+ aluminum busbar (2) and the P- aluminum busbar (3) are respectively welded with pile heads (6); The aluminum busbar also includes a B+ aluminum busbar (4) and a B- aluminum busbar (5), and the B+ aluminum busbar (4) and the B- aluminum busbar (5) are provided with waist-shaped through holes (8) for electrical connection and fixation with the aluminum busbar on the battery cell side.

3. The protective plate for the integrated aluminum pile head according to claim 1 or 2, characterized in that: The gripper (13) has a concave-convex structure.

4. The protective plate for the integrated aluminum pile head according to claim 1, characterized in that: The PCB board (1) is provided with a mating positioning hole (9) for positioning and cooperating with the tab bracket. The mating positioning hole (9) is fixedly connected to the connection hole on the tab bracket by a plastic buckle (14).

5. The protective plate for the integrated aluminum pile head according to claim 4, characterized in that: The plastic buckle (14) is provided with an annular protrusion (16) with at least one step.

6. The protective plate for the integrated aluminum pile head according to claim 5, characterized in that: The radii of the plurality of annular protrusions (16) increase sequentially from the cap end to the tip of the plastic buckle (14).

7. The protective plate for the integrated aluminum pile head according to claim 5 or 6, characterized in that: The annular protrusion (16) is a cap-shaped protrusion facing the plastic buckle (14), and at least one notch (17) is provided on its periphery.

8. The protective plate for the integrated aluminum pile head according to claim 1, characterized in that: The PCB board (1) is also provided with PCB board fixing holes (12), welding positioning holes (10), and cable tie fixing holes (11).

9. The protective plate for the integrated aluminum pile head according to claim 1, characterized in that: The PCB board (1) is equipped with several connectors (7) for collecting cell voltage and transmitting signals.

10. The protective plate for the integrated aluminum pile head according to claim 1, characterized in that: The pile head (6) is provided with a high-precision fine thread for cooperating with the nut to fix it on the outer shell, and the bottom of the pile head (6) is a square structure.

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