D-shaped hole collector plate of lithium ion battery

Abstract

The utility model belongs to the technical field of new energy batteries, and particularly relates to a D-shaped hole collector plate of a lithium ion battery, which comprises a roll core welding plate and an extension handle, one end of the extension handle is fixedly mounted on the roll core welding plate, the left side and the right side of the extension handle are respectively provided with a bent C opening, and the other end of the extension handle is fixedly mounted on the roll core welding plate. A concave welding area is formed in the roll core welding disc, a plurality of D-shaped holes are formed in the roll core welding disc, two reinforcing ribs are installed on the extension handle, the D-shaped holes are designed in the liquid guide holes in the flow collecting disc, the D-shaped holes are matched with the extension handle to achieve the positioning effect when materials are supplied in a clip mode, meanwhile, the D-shaped holes are not symmetrical on the axis of the disc, and the D-shaped holes are not symmetrical on the axis of the disc. The flow collecting plates can be prevented from being misplaced or reversely arranged; the bent C opening is designed on the extension handle of the collector plate, and the position of the C opening is reserved, so that the bent position on the extension handle during manufacturing is ensured.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery technology, and in particular to a D-shaped hole current collector for lithium-ion batteries. Background Technology

[0002] The current collector is an important component of a battery. Its main function is to collect current from the core tabs and connect the battery core to the terminals (caps). In the battery manufacturing process, most of the circular holes on existing current collectors are circular and often arranged on the central axis. Since the circular holes are axially symmetrical, it is impossible to prevent the current collector from being fooled in either direction. Furthermore, most of the bending positions on existing current collectors in the industry are not fixed and there is no pre-bent C-shaped opening, making the current collector difficult to bend. The arc angle formed at the bending position is large, which can cause compression to the core and pose a risk of short circuit to the core. Therefore, this application proposes a D-shaped hole current collector for lithium-ion batteries to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies in battery manufacturing, where the current collectors are mostly circular holes, often arranged along the central axis. Because circular holes are axially symmetrical, they cannot prevent incorrect orientation of the current collector. Furthermore, most existing current collectors in the industry do not have fixed bending positions or pre-bent C-shaped openings, making them difficult to bend. The large arc angle formed at the bending position can cause compression of the core, posing a risk of short circuit to the core. Therefore, this invention proposes a D-shaped hole current collector for lithium-ion batteries.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A lithium-ion battery D-shaped hole current collector includes a core welding disk, and the current collector further includes:

[0006] An extension handle, one end of which is fixedly mounted on a core welding disc, has a bent C-shaped opening on both the left and right sides.

[0007] As a preferred embodiment of this utility model, the core welding disc has a recessed welding area.

[0008] As a preferred embodiment of this utility model, the core welding disc is provided with multiple D-shaped holes.

[0009] As a preferred embodiment of this utility model, two reinforcing ribs are installed on the extension handle. Beneficial effects

[0010] 1. The liquid guide hole on this manifold is designed with a D-shaped hole. When the material is fed by a clip, it can be used with the extension handle to achieve a positioning effect. At the same time, the D-shaped hole is not symmetrical on the axis of the disc, which can prevent the manifold from being misaligned or reversed.

[0011] 2. The dimensions of the manifold disc and the extension handle vary considerably, and it is designed with a bending C-shaped opening to effectively control the bending position and prevent it from shifting.

[0012] 3. The extension handle of this collector plate is designed with a bent C-shaped opening. By reserving the position of the C-shaped opening, the bending position on the extension handle is ensured during manufacturing.

[0013] 4. The welding area between the current collector and the core electrode lug adopts a recessed welding area, which not only strengthens the structural strength of the disc-shaped structure, but also ensures a tighter contact between the current collector and the core electrode lug during welding, enhancing the welding effect and reducing incomplete welds.

[0014] 5. The center of the welding area of ​​this manifold is connected. It can be decided later whether the middle of the welding line is connected, depending on the situation.

[0015] 6. A pre-drilled circular hole is provided in the center of this current collector to facilitate the positioning of the current collector extension handle with the positive and negative terminals of the battery cell during manufacturing. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is the main structural view of the present invention.

[0018] In the diagram: 1. Core welding disc; 2. Extension shank; 3. Recessed welding area; 4. D-shaped hole; 5. Reinforcing rib; 6. Bent C-shaped opening. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0020] Reference Figures 1-2 A lithium-ion battery D-shaped hole current collector includes a core welding disk 1, and the current collector further includes:

[0021] The extension handle 2 has one end fixedly mounted on the core welding disc 1. The extension handle 2 has bending C-shaped openings 6 on both the left and right sides. The bending position of the extension handle 2 can be controlled by setting the bending C-shaped openings 6.

[0022] With the above structure, the collector plate is mainly composed of two parts: the core welding plate 1 and the extension handle 2. The core welding plate 1 is disc-shaped, and the extension handle 2 is designed as a strip, the length of which can be adjusted according to the actual situation.

[0023] As a preferred embodiment of this utility model, the core welding tray 1 has a recessed welding area 3. By setting the recessed welding area 3 on the core welding tray 1, the contact between the core welding tray 1 and the core can be enhanced, which facilitates the welding of the two.

[0024] As a preferred embodiment of this utility model, the core welding disc 1 is provided with multiple D-shaped holes 4. The design of the multiple D-shaped holes 4 on the core welding disc 1 adopts a non-mirror symmetrical structure (the collector disc is not symmetrical along the axis) to prevent reverse and foolproof.

[0025] As a preferred embodiment of this utility model, two reinforcing ribs 5 are installed on the extension handle 2. By providing reinforcing ribs 5 on the extension handle 2, the structural strength of the extension handle 2 is enhanced.

[0026] As a preferred embodiment of this utility model, the material of this manifold is preferably a metal with good electrical conductivity and easy bending, such as aluminum, aluminum alloy, copper, copper alloy, etc.

[0027] As a preferred embodiment of this utility model, the battery cell using this current collector has a grooving structure, and the movement of the core is controlled by the housing, which preserves space for the bending of the extension shank 2.

[0028] As a preferred embodiment of this utility model, this manifold is positioned by using a central hole and side holes, and the diameter of the central hole can be adjusted according to the actual situation.

[0029] Preferably, the width of the recessed welding area 3 should be wider than the designed weld line, and the specific width depends on the actual weld line.

[0030] As a preferred embodiment of this utility model, the extension handle 2 of this current collector is welded to the positive and negative terminals (caps) using a circular welding trajectory to ensure the uniformity of current flow.

[0031] As a preferred embodiment of this utility model, other welding shapes such as linear and radial shapes may also be adopted depending on the actual situation.

[0032] As a preferred embodiment of this utility model, the diameter of the core welding disk 1 of this collector is smaller than the core diameter;

[0033] As a preferred embodiment of this utility model, this collector plate uses a D-shaped hole 4. The D-shaped hole 4 is obtained by removing part of the structure from the circular hole. The structure is easy to process, has no sharp structure, few burrs, and the D-shaped hole 4 has a straight edge, which can be used for positioning.

[0034] As a preferred embodiment of this utility model, the D-shaped hole 4 can be replaced with a waist hole or a triangular hole, depending on the actual ease of processing and the requirements for liquid injection.

[0035] As a preferred embodiment of this utility model, the position of the D-shaped hole 4 should be moved towards the center, and suction cup positions should be reserved on both the left and right sides. The size of the suction cup positions should be determined based on the actual usage.

[0036] The working principle of this utility model is as follows: The collector plate is mainly composed of two parts: the core welding plate 1 and the extension handle 2. The core welding plate 1 is disc-shaped and has a recessed welding area 3 designed on it to enhance the contact between the core welding plate 1 and the core, making it easier to weld the two. The extension handle 2 is designed as a long strip, and its length can be adjusted according to the actual situation. The extension handle 2 is designed with reinforcing ribs 5 and bending C-shaped openings 6 to enhance the structural strength of the extension handle 2 and control the bending position of the extension handle 2. The D-shaped hole 4 opened on the core welding plate 1 is designed with a non-mirror symmetrical structure (the collector plate is not symmetrical along the axis) to prevent reverse and foolproof.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A lithium-ion battery D-shaped hole current collector, comprising a core welding disk (1), characterized in that, The collector also includes: Extension handle (2), one end of which is fixedly mounted on the core welding disc (1), and the left and right sides of the extension handle (2) are provided with bent C-shaped openings (6). The core welding disc (1) has a recessed welding area (3). The core welding disc (1) has multiple D-shaped holes (4). Two reinforcing ribs (5) are installed on the extension handle (2).

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