Anti-wear tool for battery cell

Abstract

The utility model discloses an anti-wear tool for a battery cell, which comprises a tray for transferring a lithium ion battery cell between working procedures, a buffer layer is arranged on the inner bottom wall of the tray, and an edge binding area is arranged between the edge of each side part of the buffer layer and the edge of the tray. Therefore, the buffer layer is arranged on the inner bottom wall of the tray, so that the common bottom abrasion of the outermost ceramic diaphragm battery cell is improved, and the safety of the battery cell before the assembly process is ensured. And the problem that the cycle and safety performance of the battery are influenced due to difficulty in lithium removal and lithium insertion of the outermost negative pole piece caused by abrasion of the bottom of the battery cell is avoided. In addition, the arranged edge binding area is used for binding the battery cell and can reduce damage caused by collision at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium ion battery manufacturing, in particular to an anti-wear tooling for a battery core. Background Art

[0002] Lithium-ion batteries are rechargeable batteries known for their high energy density, long cycle life, and low self-discharge. They consist of a positive electrode (typically lithium cobalt oxide or lithium manganese oxide) and a negative electrode (typically graphite), separated by an electrolyte. During charging, lithium ions migrate from the positive electrode to the negative electrode, where they become embedded in the graphite layer. During discharge, lithium ions migrate from the negative electrode to the positive electrode, releasing energy. Due to their high energy density, long cycle life, and low self-discharge, lithium-ion batteries are widely used in a variety of applications: consumer electronics (laptops, smartphones, tablets, wearable devices, etc.); electric vehicles (electric vehicles, hybrid vehicles, and plug-in hybrid vehicles); energy storage systems (grid storage and storage of renewable energy such as solar and wind energy); power tools (cordless drills, electric saws, lawn mowers, etc.); medical devices (pacemakers, defibrillators, hearing aids, etc.); and aerospace (satellites, drones, etc.).

[0003] The manufacturing process for lithium-ion single cells is divided into three stages: stage 1 (slurry mixing, coating, and roll cutting), stage 2 (winding and assembly), and stage 3 (baking, liquid injection, formation, and capacity separation). In the stage 2 winding process, different types of separators are used to separate the positive and negative electrodes to prevent direct contact and short circuits. Currently, base films of varying thicknesses are used in conjunction with adhesive and ceramic layers to improve the cycling performance and thermal dissipation capabilities of lithium-ion batteries.

[0004] During the preparation process of lithium ions, after being wound in the second section, they will flow to the assembly process through the logistics line. Since the assembly process is currently automated, the assembly speed is relatively fast. It is common to place the battery cells on a pallet for subsequent process flow. Therefore, when the pallet collides, the bottom of the battery cell is likely to be damaged, especially when the outermost layer is a ceramic coating. The bottom of the battery cell is more prone to damage, resulting in difficulties in lithium removal and lithium insertion of the outermost negative electrode sheet, thereby affecting the battery cycle and safety performance. Utility Model Content

[0005] In order to solve the technical problems existing in the background technology, the utility model proposes an anti-wear tooling for battery cells.

[0006] The utility model provides an anti-wear tool for battery cells, comprising a tray for transporting lithium-ion battery cells between processes, wherein the inner bottom wall of the tray is provided with a buffer layer, and edge restraint areas are provided between the edges of each side of the buffer layer and the edge of the tray.

[0007] Preferably, the buffer layer is made of elastic material.

[0008] Preferably, the buffer layer is bonded or snap-connected to the inner bottom wall of the tray.

[0009] Preferably, a plurality of support columns are evenly arranged on the buffer layer, and the plurality of support columns are used to support the lithium-ion battery cells.

[0010] Preferably, the tray further comprises side walls for supporting the side surfaces of the lithium-ion battery cells, and the side walls are provided with positioning members for positioning the lithium-ion battery cells.

[0011] Preferably, the buffer layer is in a square shape.

[0012] Preferably, the tray is made of plastic, metal or composite material.

[0013] In summary, the present invention has the following beneficial effects: By providing a buffer layer on the inner bottom wall of the tray, it reduces the common bottom wear of the outermost ceramic diaphragm battery cells, ensuring the safety of the battery cells before assembly. This prevents wear on the bottom of the battery cells, which can lead to difficulties in lithium removal and insertion in the outermost negative electrode sheets, thus affecting battery cycle and safety performance. Furthermore, the provided edge restraint area not only restrains the battery cells but also reduces damage caused by collisions.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of an anti-wear tooling for a battery cell according to an embodiment of the present utility model;

[0016] Figure 2 This is a perspective view of the anti-wear tooling of an embodiment of the utility model after the battery cell is placed.

[0017] In the picture:

[0018] 1. Tray; 2. Buffer layer; 3. Edge restraint area; 4. Support column; 5. Positioning piece; 6. Battery cell. DETAILED DESCRIPTION

[0019] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention, and should not be construed as limiting the present invention.

[0020] like Figure 1-2As shown, the present embodiment proposes an anti-wear tooling for battery cells, comprising a tray 1 for transporting lithium-ion battery cells between processes, a buffer layer 2 being provided on the inner bottom wall of the tray 1, and edge restraint areas 3 being provided between the edges of each side of the buffer layer 2 and the edges of the tray 1.

[0021] Specifically, the periphery of the buffer layer 2 is connected to the edge restraint region 3, including but not limited to being connected and overlapping. The provision of the edge restraint region 3 helps to effectively reduce damage to the bottom of the battery cell 6 during the assembly process, avoids degradation or downgrade of the battery cell performance in the later stage, improves the overall first pass rate, and saves production costs.

[0022] Thus, by providing a buffer layer 2 on the inner bottom wall of the tray 1, the bottom wear common to the outermost ceramic diaphragm battery cells is improved, ensuring the safety of the battery cells 6 before assembly. This prevents the wear of the battery bottom, which can lead to difficulties in lithium removal and insertion in the outermost negative electrode sheet, thus affecting battery cycle and safety performance. In addition, the edge restraint area 3 is provided to restrain the battery cells 6 and reduce damage caused by collisions.

[0023] Furthermore, the buffer layer 2 is made of elastic material, which has a good shock absorption effect and plays a buffering role during collision, thereby preventing damage to the bottom of the battery cell.

[0024] Furthermore, the buffer layer 2 is bonded or snap-fitted to the inner bottom wall of the tray 1. This connection is secure and reliable, and not prone to falling off. It should be noted that other connection methods are also possible, depending on the specific circumstances, and are not specifically limited herein.

[0025] The buffer layer 2 is also evenly distributed with multiple support columns 4, which are used to support the battery cells 6. Specifically, there are four support columns 4, located near the four inward corners of the battery cells 6. These columns not only support the lithium-ion battery cells, but also can be made of elastic material to cushion the battery cells 6 and prevent damage to the bottom of the battery cells. If the support columns 4 are damaged, the buffer layer 2 will also provide a buffering and protective effect for the battery cells 6. This way, the battery cells 6 are doubly protected, better protecting the bottom of the battery cells from damage.

[0026] Example 1:

[0027] The buffer layer 2 is square, specifically as follows Figure 1 As shown, it is set to be rectangular, and the four support pillars 4 are also rectangular. The battery cell 6 is placed in the tray 1. The bottom of the battery cell 6 is first evenly supported by the four support pillars 4 on the buffer layer 2, which can effectively reduce the chance of wear on the bottom of the battery cell.

[0028] Example 2:

[0029] The buffer layer 2 is circular, and the four support pillars 4 are also circular. The circular area has a larger contact area, which can better disperse the pressure, thereby further reducing the risk of damage to the bottom of the battery cell; and it is easier to clean and maintain.

[0030] It should be noted that, in other embodiments, the buffer layer 2 may also be in other shapes. The shape of the buffer layer 2 and the number of support pillars 4 are determined according to the size and length of the specific battery cell.

[0031] In this embodiment, Figure 2 As shown, the tray 1 further includes side walls for supporting the sides of the lithium-ion battery cells, and positioning members 5 for positioning the lithium-ion battery cells are provided on the side walls.

[0032] It should be noted that the shape, size and number of the positioning members 5 can be determined according to the adaptability of different battery cells, and play a restraining role on the battery cells 6 to prevent the battery cells from turning over during the process flow.

[0033] The tray 1 is made of plastic, metal or composite materials, and is light in weight, high in strength and corrosion-resistant.

[0034] In the preferred embodiment of the present invention, the battery cell 6 can be a square battery cell, a rectangular battery cell, or the like having a certain length, width, and thickness that conforms to the definition of a square. The outermost layer of the battery cell is a ceramic coating (the outermost ceramic diaphragm is coated without wrinkles or damage), and the rest is a rubber layer or a mixture of a rubber layer and a ceramic coating. The overall width of the ceramic diaphragm is on the non-ear side: the distance between the diaphragm and the negative electrode: 2.5±0.5mm, the distance between the negative electrode and the positive electrode: 1.5±0.5mm or other applicable dimensions; at the same time, the battery cell is a dual-electrode system or a three-electrode system battery cell; solid-state battery cells, semi-solid battery cells, lithium metal battery cells, etc. that can convert between electrical energy and chemical energy are all applicable.

[0035] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0039] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wear-resistant tool for a battery cell, comprising a tray for transporting lithium-ion battery cells between processes, characterized in that: A buffer layer is provided on the inner bottom wall of the tray, and an edge restraint area is provided between the edge of each side portion of the buffer layer and the edge of the tray.

2. The anti-wear tooling for the battery cell according to claim 1, characterized in that: The buffer layer is made of elastic material.

3. The anti-wear tooling for the battery cell according to claim 1, characterized in that: The buffer layer is bonded or snap-connected to the inner bottom wall of the tray.

4. The anti-wear tooling for the battery cell according to claim 1, characterized in that: A plurality of support columns are evenly arranged on the buffer layer, and the plurality of support columns are used to support the lithium-ion battery cells.

5. The anti-wear tooling for the battery cell according to claim 1, characterized in that: The tray further comprises side walls for supporting the side surfaces of the lithium-ion battery cells, and positioning members for positioning the lithium-ion battery cells are provided on the side walls.

6. The anti-wear tooling for the battery cell according to claim 1, characterized in that: The buffer layer is in a square shape.

7. The anti-wear tooling for the battery cell according to claim 1, characterized in that: The tray is made of plastic, metal or composite material.

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