Aluminum plastic film for lithium battery

Abstract

The utility model relates to the technical field of lithium batteries, in particular to an aluminum plastic film for a lithium battery, which comprises a protection device, the lower end of the protection device is fixedly connected with a connecting device, the lower end of the connecting device is fixedly connected with a polyamide coating, and the lower end of the polyamide coating is fixedly connected with a plastic film layer. The four corners of the outer side of the protection device, the four corners of the outer side of the connecting device, the four corners of the outer side of the polyamide coating, the four corners of the outer side of the plastic film layer and the four corners of the outer side of the multi-layer composite coating are all fixedly connected with fixing devices. According to the aluminum-plastic film for the lithium battery, through the arrangement of the protection device, the connecting device and the fixing device, the buffering and damping effects are achieved, the influence of external impact on the internal structure can be effectively reduced, and on the whole, the multi-layer structural design ensures that the aluminum-plastic film has good mechanical strength, barrier performance and buffering performance, and the service life of the aluminum-plastic film is prolonged. And stable and reliable packaging protection can be provided for the lithium battery, and safe operation of the battery in various environments is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to an aluminum-plastic film for lithium batteries. Background Art

[0002] Lithium-ion batteries are widely used in digital products and electric vehicles. The packaging forms of lithium-ion battery outer packaging shells mainly include cylindrical, square hard shells and soft aluminum-plastic films. Compared with other packaging materials, the aluminum-plastic film packaged battery will have its edge sealed first when the battery cell is thermally runaway, which can release the gas generated during the use of the lithium-ion battery to prevent the battery from exploding. At the same time, the soft-package battery cell packaged with aluminum-plastic film has high space utilization and high energy density, but the soft-package aluminum-plastic film packaging also has problems such as easy scratching, poor packaging airtightness and packaging corrosion. Therefore, we have launched an aluminum-plastic film for lithium batteries. Utility Model Content

[0003] The main purpose of the utility model is to provide an aluminum-plastic film for lithium batteries, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] An aluminum-plastic film for a lithium battery comprises a protective device, wherein the lower end of the protective device is fixedly connected to a connecting device, the lower end of the connecting device is fixedly connected to a polyamide coating, the lower end of the polyamide coating is fixedly connected to a plastic film layer, the lower end of the plastic film layer is fixedly connected to a multi-layer composite coating, and the outer four corners of the protective device, the outer four corners of the connecting device, the outer four corners of the polyamide coating, the outer four corners of the plastic film layer, and the outer four corners of the multi-layer composite coating are all fixedly connected to fixing devices.

[0006] Preferably, the protective device comprises a nylon film protective layer, a lower end of the nylon film protective layer is fixedly connected to a plurality of thermoplastic buffer adhesive layers, and the nylon film protective layer is fixedly connected to an upper end of the connecting device.

[0007] Preferably, the connecting device comprises a connecting layer, a plurality of buffer grooves are formed at the upper end of the connecting layer, and the connecting layer is fixedly connected to the upper end of the polyamide coating.

[0008] Preferably, the plurality of thermoplastic buffer adhesive layers are distributed laterally and equidistantly.

[0009] Preferably, the positional dimensions of the plurality of thermoplastic buffer adhesive layers correspond one-to-one to the positional dimensions of the plurality of buffer grooves.

[0010] Preferably, the fixing device comprises a heat sealing layer, a receiving groove is formed on the inner side of the heat sealing layer, and the heat sealing layer is fixedly connected to the outer side of the protective device.

[0011] Preferably, the outer surface of the heat-sealing layer has an arc-shaped structure.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] 1. By setting the protective device and the connecting device, a nylon film protective layer is set to provide the outer layer with anti-puncture and wear-resistant protection. A thermoplastic buffer bonding layer is set at the lower end of the nylon film protective layer, so that it has thermoplastic properties and can play a buffering and bonding role. The material layer cooperates with the buffer groove on the connecting layer to play a buffering and shock-absorbing role, which can effectively reduce the impact of external impact on the internal structure;

[0014] 2. By setting a fixing device, the heat-sealing layer can achieve a firm connection and sealing with other components. The receiving groove may be used to accommodate connecting components or play a certain positioning role to ensure the stability and integrity of the entire structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of an aluminum-plastic film for lithium batteries of the utility model;

[0016] Figure 2 This is a schematic diagram of the overall structure of a protective device for an aluminum-plastic film for a lithium battery according to the utility model;

[0017] Figure 3 This is a schematic diagram of the overall structure of a connecting device for an aluminum-plastic film for a lithium battery of the utility model;

[0018] Figure 4 The utility model is a schematic diagram of the overall structure of a fixing device for an aluminum-plastic film for a lithium battery.

[0019] In the figure: 1. protective device; 2. fixing device; 3. connecting device; 4. polyamide coating; 5. plastic film layer; 6. multi-layer composite coating; 11. nylon film protective layer; 12. thermoplastic buffer bonding layer; 31. connecting layer; 32. buffer groove; 21. heat sealing layer; 22. containing groove. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0021] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 an indirect connection 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.

[0023] See also Figure 1-4 , the utility model provides a technical solution:

[0024] A lithium battery aluminum-plastic film comprises a protective device 1, a connecting device 3 is fixedly connected to the lower end of the protective device 1, a polyamide coating 4 is fixedly connected to the lower end of the connecting device 3, a plastic film layer 5 is fixedly connected to the lower end of the polyamide coating 4, a multi-layer composite coating 6 is fixedly connected to the lower end of the plastic film layer 5, and a fixing device 2 is fixedly connected to the outer four corners of the protective device 1, the outer four corners of the connecting device 3, the outer four corners of the polyamide coating 4, the outer four corners of the plastic film layer 5, and the outer four corners of the multi-layer composite coating 6.

[0025] In this embodiment, the protective device 1 includes a nylon film protective layer 11, and a plurality of thermoplastic buffer adhesive layers 12 are fixedly connected to the lower end of the nylon film protective layer 11, and the nylon film protective layer 11 is fixedly connected to the upper end of the connecting device 3; the plurality of thermoplastic buffer adhesive layers 12 are distributed one by one at equal intervals in the horizontal direction; the position dimensions of the plurality of thermoplastic buffer adhesive layers 12 correspond one by one to the position dimensions of the plurality of buffer grooves 32; the position dimensions of the plurality of thermoplastic buffer adhesive layers 12 correspond one by one to the position dimensions of the plurality of buffer grooves 32, and the plurality of thermoplastic buffer adhesive layers 12 correspond one by one in the buffer grooves 32, and the thermoplastic buffer adhesive layers 12 are arranged one by one in the buffer grooves 32, and the thermoplastic buffer adhesive layers 12 are arranged one by one in the lower end of the nylon film protective layer 11. The buffer adhesive layer 12 is a material layer with thermoplastic properties and can play a buffering and bonding role. Thermoplasticity means that it can soften and flow at a certain temperature, and then return to a solid state after cooling. This property makes it have a certain adaptability during processing and use. As a buffer layer, it can absorb and disperse external impact, vibration and other energy, reduce the adverse effects of these factors on the aluminum-plastic film and the internal battery structure, thereby protecting the safety and stability of the battery. At the same time, it also has a bonding function, which can tightly bond adjacent material layers together, enhance the bonding force and integrity between the layers of the aluminum-plastic film, and ensure that the entire structure remains stable under various conditions.

[0026] In this embodiment, the connecting device 3 includes a connecting layer 31 , a plurality of buffer grooves 32 are formed at the upper end of the connecting layer 31 , and the connecting layer 31 is fixedly connected to the upper end of the polyamide coating 4 .

[0027] In this embodiment, the fixing device 2 includes a heat sealing layer 21, and a receiving groove 22 is opened on the inner side of the heat sealing layer 21. The heat sealing layer 21 is fixedly connected to the outer side of the protective device 1; the outer surface of the heat sealing layer 21 has an arc-shaped structure; because the outer surface of the heat sealing layer 21 has an arc-shaped structure, the arc-shaped surface is relatively smoother, which can reduce friction and collision damage with other objects, and play a certain protective role on the plastic film layer 5.

[0028] It should be noted that the utility model is an aluminum-plastic film for lithium batteries. During use, a nylon film protective layer 11 is provided to provide an outer layer with anti-puncture and wear-resistant protection. A thermoplastic buffer bonding layer 12 is provided at the lower end of the nylon film protective layer 11, so that it has thermoplastic properties and can play a buffering and bonding role. Thermoplasticity means that it can soften and flow at a certain temperature, and then restore to a solid state after cooling. This property makes it have a certain adaptability during processing and use. As a buffer layer, it can absorb and disperse external impact force, vibration and other energy, reduce the adverse effects of these factors on the aluminum-plastic film and the internal battery structure, thereby protecting the safety and stability of the battery. At the same time, it also has a bonding function, which can tightly bond adjacent material layers together to enhance The bonding strength and integrity between the layers of the aluminum-plastic film ensure that the entire structure remains stable under various conditions. It cooperates with the buffer groove 32 on the connecting layer 31 to play a buffering and shock-absorbing role, which can effectively reduce the impact of external impact on the internal structure. The polyamide coating 4 mainly plays a barrier property to prevent the intrusion of moisture, oxygen, etc. The multi-layer composite coating 6 further enhances the barrier and other properties. The fixing device 2 can achieve a firm connection and sealing with other components through its heat-sealing layer 21. The receiving groove 22 may be used to accommodate connecting components or play a certain positioning role to ensure the stability and integrity of the entire structure. On the whole, this multi-layer structure design ensures that the aluminum-plastic film has good mechanical strength, barrier properties and buffering properties, can provide stable and reliable packaging protection for lithium batteries, and ensure the safe operation of batteries in various environments.

[0029] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An aluminum-plastic film for lithium batteries, comprising a protective device (1), characterized in that: The lower end of the protective device (1) is fixedly connected to a connecting device (3), the lower end of the connecting device (3) is fixedly connected to a polyamide coating (4), the lower end of the polyamide coating (4) is fixedly connected to a plastic film layer (5), the lower end of the plastic film layer (5) is fixedly connected to a multi-layer composite coating (6), and the four outer corners of the protective device (1), the four outer corners of the connecting device (3), the four outer corners of the polyamide coating (4), the four outer corners of the plastic film layer (5), and the four outer corners of the multi-layer composite coating (6) are all fixedly connected to a fixing device (2).

2. The aluminum-plastic film for lithium battery according to claim 1, characterized in that: The protective device (1) comprises a nylon film protective layer (11), the lower end of the nylon film protective layer (11) is fixedly connected to a plurality of thermoplastic buffer adhesive layers (12), and the nylon film protective layer (11) is fixedly connected to the upper end of the connecting device (3).

3. The aluminum-plastic film for lithium battery according to claim 1, characterized in that: The connecting device (3) comprises a connecting layer (31), a plurality of buffer grooves (32) are formed at the upper end of the connecting layer (31), and the connecting layer (31) is fixedly connected to the upper end of the polyamide coating (4).

4. The aluminum-plastic film for lithium battery according to claim 2, characterized in that: The plurality of thermoplastic buffer adhesive layers (12) are distributed one by one at equal intervals in the transverse direction.

5. The aluminum-plastic film for lithium battery according to claim 2, characterized in that: The positional dimensions of the plurality of thermoplastic buffer adhesive layers (12) correspond one-to-one to the positional dimensions of the plurality of buffer grooves (32).

6. The aluminum-plastic film for lithium battery according to claim 1, characterized in that: The fixing device (2) comprises a heat sealing layer (21), a receiving groove (22) is provided on the inner side of the heat sealing layer (21), and the heat sealing layer (21) is fixedly connected to the outer side of the protection device (1).

7. The aluminum-plastic film for lithium battery according to claim 6, characterized in that: The outer surface of the heat-sealing layer (21) is in an arc-shaped structure.

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