Swelling adhesive tape for lithium battery

Abstract

The utility model relates to the technical field of lithium batteries, in particular to a swelling adhesive tape for a lithium battery, which adopts the technical scheme that the swelling adhesive tape comprises a swelling adhesive tape body for the lithium battery, a polypropylene film layer, an acrylate polymer layer, a polyimide layer, an aluminum foil layer and a stainless steel layer, the swelling adhesive tape body for the lithium battery is composed of a polypropylene film layer, an acrylate polymer layer, a polyimide layer, an aluminum foil layer and a stainless steel layer, the acrylate polymer layer is arranged at the top of the polypropylene film layer, the polyimide layer is arranged at the top of the acrylate polymer layer, the aluminum foil layer is arranged at the top of the polyimide layer, and the stainless steel layer is arranged at the top of the aluminum foil layer. A stainless steel layer is arranged on the top of the aluminum foil layer. The swelling adhesive tape has the advantage that the structural strength and the waterproofness of the swelling adhesive tape body for the lithium battery are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a swelling tape for lithium batteries. Background Art

[0002] A lithium battery is a battery that uses lithium metal or lithium alloy as an electrode material. It is a common type of rechargeable battery and is widely used in a variety of electronic devices and mobile devices. There are several common types of lithium batteries, including lithium-ion batteries, lithium polymer batteries, and lithium iron batteries. Among them, lithium-ion batteries are the most common and popular. Lithium batteries have many advantages. They have high energy density, which means that they can provide a longer battery life with a relatively small size and weight. Lithium batteries have a low self-discharge rate and can maintain a charge even when not in use. Lithium batteries also have the characteristics of fast charging and high discharge capabilities. Lithium batteries may produce gas due to internal chemical reactions during use, causing the battery to inflate or expand. In order to prevent excessive internal pressure, in this case, you can consider using swelling tape. Swelling tape is a special tape that can expand to form a sealing layer when it is affected by gas, effectively reducing internal pressure. When the battery expands, the swelling tape will automatically expand to fill the space and form a sealing layer to prevent gas leakage and further expansion.

[0003] Insufficient structural strength of the swelling tape may cause the battery to deform or be damaged easily under vibration or impact, which may have a negative impact on key components inside the battery and may increase the risk of short circuit, fire or explosion. Lack of good waterproof performance may expose the battery to humid or liquid environments. Moisture leakage into the battery may trigger chemical reactions, resulting in battery performance degradation or even failure. In addition, water ingress may also increase the risk of battery short circuit, electrolyte leakage or battery swelling. Utility Model Content

[0004] The utility model aims to provide a swelling tape for lithium batteries, which has the advantages of enhancing the structural strength and waterproofness of the swelling tape body for lithium batteries, and solves the problem of insufficient structural strength and waterproofness of the swelling tape.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a swelling tape for a lithium battery, comprising a swelling tape body for a lithium battery, a polypropylene film layer, an acrylate polymer layer, a polyimide layer, an aluminum foil layer and a stainless steel layer, wherein the swelling tape body for a lithium battery consists of a polypropylene film layer, an acrylate polymer layer, a polyimide layer, an aluminum foil layer and a stainless steel layer, an acrylate polymer layer is arranged on the top of the polypropylene film layer, a polyimide layer is arranged on the top of the acrylate polymer layer, an aluminum foil layer is arranged on the top of the polyimide layer, and a stainless steel layer is arranged on the top of the aluminum foil layer.

[0006] When using a swelling tape for lithium batteries in the technical solution, the polypropylene film layer provides certain strength and flexibility, the acrylate polymer layer has the characteristics of hygroscopic expansion, and can absorb electrolyte and expand when the battery is damaged, playing the role of isolating the channel, the polyimide layer has good insulation performance, high strength and low thermal expansion coefficient, the aluminum foil layer can provide the function of current concentration and uniform distribution, and protect the electrolyte inside the lithium battery from erosion by external oxygen and humidity, the stainless steel layer has high strength, excellent corrosion resistance and conductivity, and stainless steel can provide a solid support, making the lithium battery structure more stable and reliable.

[0007] Preferably, the top of the polypropylene film layer and the bottom of the acrylate polymer layer are connected by an adhesive, and the adhesive fixes the polypropylene film layer and the acrylate polymer layer together.

[0008] Preferably, the top of the acrylate polymer layer and the bottom of the polyimide layer are connected by an adhesive, and the adhesive fixes the acrylate polymer layer and the polyimide layer together.

[0009] Preferably, the top of the polyimide layer and the bottom of the aluminum foil layer are connected by an adhesive, and the adhesive fixes the polyimide layer and the aluminum foil layer together.

[0010] Preferably, the top of the aluminum foil layer and the bottom of the stainless steel layer are connected by an adhesive, which fixes the aluminum foil layer and the stainless steel layer together.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model arranges a polyimide layer, an aluminum foil layer and a stainless steel layer, and the substrate material of the swelling tape body for a lithium battery consists of the polyimide layer, the aluminum foil layer and the stainless steel. The polyimide layer has good insulation performance, high strength and a low thermal expansion coefficient. The aluminum foil layer can provide the functions of current concentration and uniform distribution, and protect the electrolyte inside the lithium battery from the erosion of external oxygen and humidity. The stainless steel layer has high strength, excellent corrosion resistance and electrical conductivity. The stainless steel can provide a stable support, so that the lithium battery structure is more stable and reliable, thereby achieving the effect of strengthening the structural strength and waterproofness of the swelling tape body for a lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from a first angle;

[0014] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model from a second angle;

[0015] Figure 3 This is a schematic diagram of the three-dimensional structure of the utility model from a third angle;

[0016] Figure 4 It is a cross-sectional structural schematic diagram of the utility model.

[0017] In the figure: 1. Swellable tape body for lithium battery; 2. Polypropylene film layer; 3. Acrylate polymer layer; 4. Polyimide layer; 5. Aluminum foil layer; 6. Stainless steel layer. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation methods disclosed below.

[0020] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general scale, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0021] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Embodiment 1

[0023] like Figure 1-Figure 4 As shown, the utility model provides a swelling tape for lithium batteries, comprising a swelling tape body 1 for lithium batteries, a polypropylene film layer 2, an acrylate polymer layer 3, a polyimide layer 4, an aluminum foil layer 5 and a stainless steel layer 6. The swelling tape body 1 for lithium batteries consists of the polypropylene film layer 2, the acrylate polymer layer 3, the polyimide layer 4, the aluminum foil layer 5 and the stainless steel layer 6. The acrylate polymer layer 3 is arranged on the top of the polypropylene film layer 2, the polyimide layer 4 is arranged on the top of the acrylate polymer layer 3, the aluminum foil layer 5 is arranged on the top of the polyimide layer 4, and the stainless steel layer 6 is arranged on the top of the aluminum foil layer 5.

[0024] In this embodiment, the polypropylene film layer 2 provides certain strength and flexibility, the acrylate polymer layer 3 has the characteristics of hygroscopic expansion, and can absorb electrolyte and expand when the battery is damaged, playing the role of isolating the channel, the polyimide layer 4 has good insulation performance, high strength and low thermal expansion coefficient, the aluminum foil layer 5 can provide the function of current concentration and uniform distribution, and protect the electrolyte inside the lithium battery from external oxygen and humidity erosion, the stainless steel layer 6 has high strength, excellent corrosion resistance and conductivity, and stainless steel can provide a stable support, making the lithium battery structure more stable and reliable.

[0025] Embodiment 2

[0026] like Figure 1-Figure 4 As shown, the utility model proposes a swelling tape for lithium batteries. Compared with the first embodiment, this embodiment also includes: a swelling tape body 1 for lithium batteries, the top of the polypropylene film layer 2 and the bottom of the acrylate polymer layer 3 are connected by adhesive, the top of the acrylate polymer layer 3 and the bottom of the polyimide layer 4 are connected by adhesive, the top of the polyimide layer 4 and the bottom of the aluminum foil layer 5 are connected by adhesive, and the top of the aluminum foil layer 5 and the bottom of the stainless steel layer 6 are connected by adhesive.

[0027] In this embodiment, the polypropylene film layer 2, the acrylate polymer layer 3, the polyimide layer 4, the aluminum foil layer 5 and the stainless steel layer 6 are fixed together by an adhesive to form a swelling tape body 1 for lithium batteries, which is convenient for staff to use.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A swelling tape for lithium battery, comprising a swelling tape body for lithium battery (1), a polypropylene film layer (2), an acrylate polymer layer (3), a polyimide layer (4), an aluminum foil layer (5) and a stainless steel layer (6), characterized in that: The swelling tape body (1) for lithium batteries is composed of a polypropylene film layer (2), an acrylate polymer layer (3), a polyimide layer (4), an aluminum foil layer (5) and a stainless steel layer (6); the acrylate polymer layer (3) is arranged on the top of the polypropylene film layer (2); the polyimide layer (4) is arranged on the top of the acrylate polymer layer (3); the aluminum foil layer (5) is arranged on the top of the polyimide layer (4); and the stainless steel layer (6) is arranged on the top of the aluminum foil layer (5).

2. A swelling tape for lithium batteries according to claim 1, characterized in that: The top of the polypropylene film layer (2) and the bottom of the acrylate polymer layer (3) are connected by an adhesive.

3. The swelling tape for lithium battery according to claim 1, characterized in that: The top of the acrylate polymer layer (3) and the bottom of the polyimide layer (4) are connected using an adhesive.

4. The swelling tape for lithium battery according to claim 1, characterized in that: The top of the polyimide layer (4) and the bottom of the aluminum foil layer (5) are connected using an adhesive.

5. The swelling tape for lithium battery according to claim 1, characterized in that: The top of the aluminum foil layer (5) and the bottom of the stainless steel layer (6) are connected using an adhesive.

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