Blackened copper foil adhesive tape and battery pack

Abstract

The utility model relates to a blackened copper foil adhesive tape and battery pack, the blackened copper foil adhesive tape comprises a blackened copper foil layer and a glue layer, the blackened copper foil layer comprises a copper foil, a blackened layer is electroplated on the surface of the copper foil, and the glue layer is coated on one surface of the copper foil far away from the blackened layer. The adhesive tape has the advantages of high conductivity, excellent corrosion resistance, high value and strong adhesive force.

Description

Technical Field

[0001] This utility model relates to the field of electronic technology, and in particular to a blackened copper foil tape and battery pack. Background Technology

[0002] In the field of battery manufacturing and application, black copper foil tape is widely used for connecting and externally protecting battery electrodes as an important conductive and encapsulating material. However, existing black copper foil tapes suffer from defects such as poor conductivity, poor corrosion resistance, low dyne value, and insufficient encapsulation performance, which severely limit their application in the battery field, especially in scenarios requiring high reliability and long lifespan. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a blackened copper foil tape, which has high conductivity, excellent corrosion resistance, high coefficient of performance and strong adhesion.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a blackened copper foil tape, comprising a blackened copper foil layer and an adhesive layer, wherein the blackened copper foil layer comprises copper foil, and a blackening layer is electroplated on the surface of the copper foil, and the adhesive layer is coated on the side of the copper foil away from the blackening layer.

[0005] In one embodiment, the adhesive layer of the blackened copper foil tape has a first release layer on the side away from the copper foil, and the blackened layer has a second release layer on the side away from the copper foil.

[0006] In one embodiment, the thickness of the copper foil in the blackened copper foil tape is 17.5 ± 0.5 μm.

[0007] In one embodiment, the thickness of the adhesive layer of the blackened copper foil tape is 15 μm.

[0008] A battery pack, employing the aforementioned blackened copper foil tape, includes a battery, with the blackened copper foil tape wrapped around the battery, and the adhesive layer of the blackened copper foil tape adhered to the battery.

[0009] In one embodiment, a QR code or digital identifier is printed on the blackened layer of the battery pack.

[0010] The beneficial effects of this application are as follows:

[0011] This application provides a blackened copper foil tape. By electroplating a blackening layer on one side of the copper foil, the conductivity, corrosion resistance, and dyne value of the copper foil are significantly improved, ensuring stable electrical performance of the battery during long-term use. An adhesive layer is applied to the other side of the copper foil, allowing it to firmly adhere to the battery surface, solving the problem of insufficient adhesion in ordinary copper foil tapes and preventing detachment during roller testing or use. This blackened copper foil tape, through optimized material composition and structural design, significantly improves conductivity, corrosion resistance, dyne value, and adhesion, solving the problems existing in ordinary copper foil tapes in battery applications.

[0012] The battery pack uses blackened copper foil tape to wrap the batteries, which significantly extends the battery pack's lifespan and improves the overall reliability of the product.

[0013] The battery pack also improves the level of informatization in the production and use process by printing QR codes on the blackened layer of the blackened copper foil tape to track and manage the battery pack. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the blackened copper foil tape according to an embodiment of this application;

[0015] Figure 2 This is a schematic diagram of a battery pack according to an embodiment of this application;

[0016] in:

[0017] 1. Adhesive layer; 2. Copper foil; 3. Blackening layer; 4. Second release layer; 5. First release layer; 6. Battery. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, an embodiment of this application provides a blackened copper foil tape, including a blackened copper foil 2 layer and an adhesive layer 1. The blackened copper foil 2 layer includes a copper foil 2, and a blackening layer 3 is electroplated on the surface of the copper foil 2. The adhesive layer 1 is coated on the side of the copper foil 2 away from the blackening layer 3.

[0020] Specifically, a copper foil 2 with a thickness of 17.5±0.5μm is used. Electroplating is performed on one side of the copper foil 2. After surface blackening, the roughness increases, but the basic performance of the product remains unchanged. A current density of 43-68A / dm² is used. 2An electroplating process with a vehicle speed of 15-20 m / min is used to form a blackening layer 3 with a thickness of 0.1-0.3 μm on the surface of copper foil 2. Then, acrylic adhesive or silicone is coated on the other side of copper foil 2 to form an adhesive layer 1 with a thickness of 15 μm, making the total thickness of the blackened copper foil tape 30±0.5 μm. The copper foil uses an ultra-hard copper-based material with a tensile strength ≥300 MPa and an elongation ≥5% to improve mechanical strength and flexibility. The adhesive layer uses acrylic adhesive or silicone material, which has high temperature resistance (≤150℃) and low temperature resistance (≥-40℃), making it suitable for extreme environments. The dyne value of this blackened copper foil tape is ≥40, and the resistivity per square meter is ≤15 mΩ.

[0021] Place the blackened copper foil tape in a 5% NaCl solution with a pH of 6.5-7.2, and add 1-2 ml / 80cm³ of solution. 2 A salt spray test was conducted using a spray volume of / H, followed by placement at a 45° angle for 48 hours. After the experiment, the blackened layer 3 of the blackened copper foil tape showed no oxidation or peeling. Therefore, the blackened copper foil tape exhibits excellent corrosion resistance and adhesion.

[0022] In the above structure, by electroplating a blackening layer 3 on one side of the copper foil 2, the conductivity, corrosion resistance, and dyne value of the copper foil 2 are significantly improved, ensuring that the battery 6 maintains stable electrical performance during long-term use. An adhesive layer 1 is applied to the other side of the copper foil 2, allowing the copper foil 2 to adhere firmly to the surface of the battery 6, solving the problem of insufficient adhesion of ordinary copper foil tape and preventing it from falling off during roller testing or use. This blackened copper foil tape has high conductivity, excellent corrosion resistance, strong adhesion, and stable mechanical properties, and can be widely used in battery packs, electronic devices, and other fields to meet the requirements of high-reliability applications.

[0023] like Figure 1 As shown, in one embodiment, the adhesive layer 1 of the blackened copper foil tape has a first release layer 5 on the side away from the copper foil 2, and the blackened layer 3 has a second release layer 4 on the side away from the copper foil 2. The first release layer 5 protects the adhesive layer 1 from contamination or damage, ensuring its cleanliness and adhesion. The second release layer 4 protects the blackened layer 3 from scratches or oxidation, maintaining its surface roughness and functionality. The first and second release layers 5 prevent the adhesive layer 1 and the blackened layer 3 from sticking together or being damaged during storage and transportation, improving product stability and reliability. Protected by the first and second release layers 5 and 4, the adhesive layer 1 and the blackened layer 3 will not fail due to environmental factors before use, thus extending the product's lifespan.

[0024] like Figure 1As shown, in one embodiment, the thickness of the copper foil 2 in the blackened copper foil tape is 17.5 ± 0.5 μm. This thickness of copper foil 2 improves the mechanical strength, conductivity, flexibility, and adhesion of the blackened copper foil tape, while ensuring stability and consistency.

[0025] like Figure 1 As shown, in one embodiment, the adhesive layer 1 of the blackened copper foil tape has a thickness of 15 μm. This thickness of adhesive layer 1 improves the adhesion, cushioning, flexibility, and insulation of the blackened copper foil tape, ensuring product stability and consistency.

[0026] like Figure 2 As shown, an embodiment of this application also provides a battery pack using the aforementioned blackened copper foil tape, including a battery 6. The battery 6 is wrapped with the blackened copper foil tape, and the adhesive layer 1 of the blackened copper foil tape is adhered to the battery 6. The resistance per square meter of the blackened copper foil tape is ≤15mΩ, ensuring efficient current transmission within the battery pack, reducing energy loss, and improving the performance of the battery 6. The adhesive layer 1 of the blackened copper foil tape is 15μm thick, which can firmly adhere to the surface of the battery 6, preventing it from falling off under vibration or impact, and improving the stability and reliability of the battery pack. The battery pack design using blackened copper foil tape has excellent conductivity, strong adhesion, corrosion resistance, good mechanical strength, and heat dissipation performance, significantly improving the performance and reliability of the battery pack and extending its service life.

[0027] like Figure 2 As shown, in one embodiment, a QR code or digital identifier is printed on the blackened layer 3 of the battery pack. A high-temperature resistant ink printing process is used to ensure that the QR code does not peel off or deform under high-temperature environments. Laser engraving can also be used to improve the durability and clarity of the digital identifier. This arrangement facilitates the tracking and management of the battery pack, improving the level of informatization in the production and use processes.

[0028] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A blackened copper foil adhesive tape, characterized by, The blackened copper foil (2) layer comprises a copper foil (2), a blackening layer (3) is arranged on the surface of the copper foil (2) by electroplating, and the adhesive layer (1) is coated on the side of the copper foil (2) away from the blackening layer (3).

2. The blackened copper foil tape of claim 1, wherein, The adhesive layer (1) is provided with a first release layer (5) on the side away from the copper foil (2), and the blackening layer (3) is provided with a second release layer (4) on the side away from the copper foil (2).

3. The blackened copper foil tape of claim 1, wherein The thickness of the copper foil (2) is 17.5±0.5μm.

4. The blackened copper foil tape of claim 1, wherein The thickness of the adhesive layer (1) is 15μm.

5. A battery pack employing the blackened copper foil tape according to any one of claims 1 to 4, characterized by, The battery (6) is wrapped with a blackened copper foil tape, and the adhesive layer (1) of the blackened copper foil tape is attached to the battery (6).

Images