Cylindrical full-tab large-current collector plate structure

Abstract

The utility model discloses a cylindrical full-tab large-current collector plate structure which comprises a plate body and a tail body, a foldable connecting body is arranged between the plate body and the tail body, the connecting body is integrally connected with the plate body and the tail body, and the cylindrical full-tab large-current collector plate structure is characterized in that a plurality of through holes are formed in the plate body; the thickness of the disc body is the same as that of the tail body, and the thickness of the disc body and the thickness of the tail body are both smaller than that of the connecting body. The width of the disc body is larger than that of the tail body, and the width of the tail body is larger than that of the connecting body. According to the utility model, the thickness and the width are designed in a segmented manner, so that the thickness of the connecting body is greater than the thicknesses of the disc body and the tail body, the width of the disc body is greater than the width of the tail body, and the width of the tail body is greater than the width of the connecting body, and therefore, sufficient flow capacity is ensured, the welding effect can be ensured, and the internal space of the shell is saved.

Description

Technical Field

[0001] This utility model relates to the field of battery equipment technology, and in particular to a cylindrical full-tab high-current collector structure. Background Technology

[0002] With the development of the industry, the application scenarios of lithium (sodium) ion batteries are becoming increasingly widespread. With the development of the new energy industry, lithium (sodium) ions are penetrating various fields. Battery requirements include comprehensive indicators such as capacity, lifespan, safety, environmental adaptability, model, and rate capability. Cylindrical batteries are widely used in energy storage, power supply, electric vehicles, and other fields due to their lower production costs, higher production efficiency, and good safety. Cylindrical batteries can be designed with various functions depending on their application, such as capacity-type, long-cycle-time-type, low-temperature-type, and rate-type. Furthermore, cylindrical batteries can be classified by tab type, including multi-tab and full-tab structures. Full-tab batteries commonly use a current collector connected to the casing and cap welded together. However, due to considerations such as laser welding and folded tabs, the thickness of full-tab batteries is difficult to increase, generally ≤0.5mm, which limits their high-current overcurrent capacity. Therefore, a current collector structure needs to be designed to meet the high-current charging and discharging overcurrent energy requirements without affecting tab folding and core pressing, maximizing the utilization of the internal space of the casing. Utility Model Content

[0003] The purpose of this invention is to provide a cylindrical full-tab high-current collector structure that solves the above-mentioned problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A cylindrical omni-latch high-current collector structure includes a disk body and a tail body. A foldable connector is provided between the disk body and the tail body. The connector is integrally connected to the disk body and the tail body. The disk body has several through holes. The thickness of the disk body is the same as the thickness of the tail body. The thickness of both the disk body and the tail body is less than the thickness of the connector. The width of the disk body is greater than the width of the tail body. The width of the tail body is greater than the width of the connector.

[0006] Preferably, the through hole includes a first through hole disposed at the center of the disk body and a plurality of second through holes disposed around the outer periphery of the first through hole, wherein the first through hole is circular in shape and the second through holes are strip-shaped.

[0007] Preferably, both the disc body and the tail body are arc-shaped on the side away from the connector, and the connector is rectangular in shape.

[0008] Preferably, the width of the connector is 20mm.

[0009] Preferably, the thickness of the disc body and the tail body is less than or equal to 0.5 mm, and the thickness of the connector is less than or equal to 1 mm.

[0010] Preferably, the thickness of the disc body and the tail body is 0.3-0.5 mm, and the thickness of the connector is 0.3-1 mm.

[0011] The beneficial effects of this utility model are: the thickness and width of this utility model are designed in segments, so that the thickness of the connecting body is greater than the thickness of the disc body and the tail body, the width of the disc body is greater than the width of the tail body, and the width of the tail body is greater than the width of the connecting body. This ensures sufficient flow capacity while also ensuring welding effect and saving internal space of the shell. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a front view structural diagram of the present invention;

[0014] The components include a disc body 1, a tail body 2, a connecting body 3, a first through hole 4, and a second through hole 5. Detailed Implementation

[0015] The technical solution of this utility model will be further described in detail below with reference to specific embodiments.

[0016] In the description of this utility model, it should be noted that the terms "inner", "outer", "upper", "lower", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] like Figures 1 to 2 As shown, this utility model provides a cylindrical all-tab high-current collector structure, which includes a disk body 1 for laser welding to a core (not shown) and a tail body 2 for welding to a cap. A foldable connector 3 for direct current flow is provided between the disk body 1 and the tail body 2, and the connector 3 is integrally connected to the disk body 1 and the tail body 2. The disk body 1 has several through holes, including a first through hole 4 and a second through hole 5, for injecting electrolyte and reducing the weight of the disk body 1. The first through hole 4 is located at the center of the disk body 1 and is circular. The second through holes 5 are located on the outer periphery of the first through hole 4, and there are multiple second through holes 5 radiating outwards from the outer periphery of the first through hole 4. The second through holes 5 are strip-shaped.

[0018] Furthermore, the thickness of this invention is segmented, with varying thicknesses in three segments. The thickness of the disc body 1 is the same as that of the tail body 2, and both the thickness of the disc body 1 and the tail body 2 is less than the thickness of the connecting body 3. The thinner disc body 1 and tail body 2 facilitate welding. Specifically, the thickness of the disc body 1 and tail body 2 is less than or equal to 0.5 mm, and the thickness of the connecting body 3 is less than or equal to 1 mm. The disc body 1 and tail body 2 are laser-welded and flow-through surfaces; to ensure welding quality, their thickness should not be too large. The connecting body 3 serves as a channel connecting the cap and the core, and its thickness can be increased to ensure sufficient flow capacity. Preferably, the thickness of the disc body 1 and tail body 2 is 0.3-0.5 mm, and the thickness of the connecting body 3 is 0.3-1 mm.

[0019] Furthermore, the width of the disc body 1 is greater than the width of the tail body 2, and the width of the tail body 2 is greater than the width of the connecting body 3. Increasing the width of the disc body 1 and the tail body 2 increases the area and ensures the current carrying capacity. Both the disc body 1 and the tail body 2 are arc-shaped on the side away from the connecting body 3, ensuring the laser welding area of ​​the disc body 1 and the tail body 2. The connecting body 3 is rectangular in shape for easy folding. The thickness of this invention can be designed according to the current carrying requirements, and the width can be designed based on the welding area of ​​the core and the cap. In one embodiment of this invention, the thickness of both the disc body 1 and the tail body 1 is 0.5mm, the thickness of the connecting body 3 is 1mm, and the width of the connecting body 3 is 20mm, which can meet the 160A continuous current carrying requirement.

[0020] The thickness and width of this utility model are segmented, so that the thickness of the connecting body is greater than the thickness of the disc body and the tail body, the width of the disc body is greater than the width of the tail body, and the width of the tail body is greater than the width of the connecting body. This ensures sufficient current flow capacity while also ensuring welding effect and saving internal space of the shell.

[0021] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cylindrical all-tab high-current collector structure, comprising a disk body and a tail body, wherein a foldable connecting body is provided between the disk body and the tail body, and the connecting body is integrally connected to the disk body and the tail body, characterized in that: The disc body has several through holes; the thickness of the disc body is the same as the thickness of the tail body, and the thickness of both the disc body and the tail body is less than the thickness of the connector; the width of the disc body is greater than the width of the tail body, and the width of the tail body is greater than the width of the connector; the width of the connector is 20mm; the thickness of the disc body and the tail body is less than or equal to 0.5mm, and the thickness of the connector is less than or equal to 1mm; the thickness of the disc body and the tail body is 0.3-0.5mm, and the thickness of the connector is 0.3-1mm.

2. The cylindrical all-tab high-current collector structure according to claim 1, characterized in that: The through hole includes a first through hole disposed at the center of the disk body and a plurality of second through holes disposed around the outer periphery of the first through hole. The first through hole is circular in shape and the second through holes are strip-shaped.

3. The cylindrical all-tab high-current collector structure according to claim 1, characterized in that: Both the disc and the tail are arc-shaped on the side away from the connector, and the connector is rectangular in shape.

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