Aerogel heat insulation film structure for lithium battery

Abstract

The utility model discloses an aerogel heat insulation film structure for a lithium battery, which comprises an aerogel film component, a rolling component and a pressing and rolling component, and the aerogel film component comprises a base layer, a phase change layer, a heat insulation layer, a bonding layer and a release film layer which are arranged from inside to outside; the winding assembly comprises a lower end plate, a connecting cylinder is fixed to the upper end face of the lower end plate, a threaded cylinder is in threaded engagement with an inner cavity of the connecting cylinder, an upper end plate is fixed to the upper end face of the threaded cylinder, a first kidney-shaped groove is formed in one side of the upper end plate, a second kidney-shaped groove is formed in one side of the lower end plate, an I-shaped block is sleeved with an inner cavity of the second kidney-shaped groove, and a pressing roller is rotationally installed on the upper end face of the I-shaped block. According to the utility model, the aerogel membrane assembly can be rolled up to facilitate storage and carrying, when the aerogel membrane assembly needs to be used, the aerogel membrane assembly is manually rotated and taken out, so that the lithium battery can be laminated, the use is convenient, and the aerogel membrane assembly is formed by compounding a plurality of layers, so that the lithium battery cannot be overheated and is kept at a constant temperature; and the heat insulation effect of the lithium battery is better.

Description

Technical Field

[0001] The utility model relates to the technical field of materials, and in particular to an aerogel heat-insulating film structure for a lithium battery. Background Art

[0002] Aerogel thermal insulation film for lithium batteries is a high-performance thermal insulation material used in lithium batteries. Its main purpose is to provide effective thermal insulation protection to prevent thermal runaway of the battery under high temperature or abnormal working conditions, thereby improving the safety and performance stability of the battery. Aerogel is a material with ultra-low density, microporous structure and excellent thermal insulation performance. It is widely used in the field of lithium batteries. Aerogel thermal insulation film plays a role in thermal insulation, heat conduction control and thermal stability improvement inside the battery through its microporous structure and low thermal conductivity. During the operation of lithium batteries, heat will be generated inside the battery. If it cannot be effectively dissipated, it will cause the battery to overheat and even cause safety risks. The application of aerogel thermal insulation film can effectively reduce the conduction of heat inside the battery, reduce the battery temperature, and improve the safety and cycle life of the battery. In addition to excellent thermal insulation performance, aerogel thermal insulation film also has the characteristics of light weight, softness, chemical stability, etc., which helps to improve the energy density and service life of the battery.

[0003] Patent document with publication number CN204971376U discloses an aerogel thermal insulation film, comprising: a substrate, a phase change layer and an aerogel thermal insulation layer; the phase change layer and the aerogel thermal insulation layer are sequentially attached to the substrate, or the aerogel thermal insulation layer and the phase change layer are sequentially attached to the substrate.

[0004] In the above device, although heat storage and constant temperature environment simulation are achieved, when used in smart electronic products, overheating will not occur and the temperature is basically maintained at a constant temperature, which can achieve a more comfortable experience. However, during use, the aerogel insulation film does not have a self-winding function, making it inconvenient to carry and use. Utility Model Content

[0005] The utility model aims to solve the disadvantages of the existing lithium battery aerogel heat insulation film structure that it does not have a self-rolling function and is inconvenient to carry and use.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An aerogel thermal insulation film structure for a lithium battery, comprising an aerogel film assembly, a winding assembly and a pressing assembly, wherein the aerogel film assembly comprises a base layer, a phase change layer, a thermal insulation layer, an adhesive layer and a release film layer arranged from inside to outside;

[0008] The winding assembly includes a lower end plate, an upper end surface of the lower end plate is fixed with a connecting tube, an inner cavity of the connecting tube is threadedly engaged with a threaded tube, an upper end plate is fixed to the upper end surface of the threaded tube, one side of the upper end plate is provided with a waist groove 1, one side of the lower end plate is provided with a waist groove 2, an I-shaped block is sleeved in the inner cavity of the waist groove 2, a pressure roller is rotatably installed on the upper end surface of the I-shaped block, a spring seat is fixed to the lower end surface of the lower end plate, and a reset spring is fixed between the spring seat and the lower end surface of the I-shaped block.

[0009] As a further description of the above technical solution:

[0010] The lower end plate is movably connected to the lower end of the aerogel membrane assembly, and the upper end plate is movably connected to the upper end of the aerogel membrane assembly.

[0011] As a further description of the above technical solution:

[0012] The upper end plate forms an assembleable structure between the threaded barrels.

[0013] As a further description of the above technical solution:

[0014] The aerogel membrane assembly is wound and rolled on the surface of the connecting tube.

[0015] As a further description of the above technical solution:

[0016] The upper end of the pressing roller is sleeved with an inner cavity of the waist groove, and the pressing roller is movably connected with the surface of the aerogel membrane assembly.

[0017] As a further description of the above technical solution:

[0018] The pressing roller forms a movable structure between the I-shaped block and the second waist groove.

[0019] As a further description of the above technical solution:

[0020] The waist groove 2 forms an elastic telescopic structure through the return spring and the spring seat.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0022] In the utility model, the aerogel film assembly can be rolled up for easy storage and carrying. When it is needed, the aerogel film assembly can be manually rotated and taken out, and then the lithium battery can be attached. It is easy to use. The aerogel film assembly is made of multi-layer composite, so that the lithium battery will not overheat and maintain a constant temperature, so that the lithium battery has a better heat insulation effect. In summary, the problems in the background technology are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the aerogel membrane component in the utility model;

[0024] Figure 2 This is a schematic structural diagram of an aerogel thermal insulation film structure for lithium batteries in the utility model;

[0025] Figure 3 It is a schematic diagram of the structure of an explosion of an aerogel thermal insulation film structure for lithium batteries in the utility model;

[0026] Figure 4 It is a structural schematic diagram of the lower end plate of the utility model.

[0027] Legend:

[0028] 1. Aerogel membrane assembly; 101. Base layer; 102. Phase change layer; 103. Thermal insulation layer; 104. Adhesive layer; 105. Release film layer; 2. Lower end plate; 3. Connecting tube; 4. Threaded tube; 5. Upper end plate; 6. Waist groove one; 7. Waist groove two; 8. I-shaped block; 9. Pressure roller; 10. Spring seat; 11. Return spring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Reference Figure 1-Figure 4 , an aerogel thermal insulation film structure for lithium batteries, comprising an aerogel film assembly 1, a winding assembly and a pressing assembly, wherein the aerogel film assembly 1 comprises a base layer 101, a phase change layer 102, a thermal insulation layer 103, an adhesive layer 104 and a release film layer 105 arranged from inside to outside;

[0031] The winding assembly includes a lower end plate 2, a connecting tube 3 is fixed to the upper end surface of the lower end plate 2, a threaded tube 4 is threadedly engaged in the inner cavity of the connecting tube 3, an upper end plate 5 is fixed to the upper end surface of the threaded tube 4, a waist groove 1 6 is opened on one side of the upper end plate 5, a waist groove 2 7 is opened on one side of the lower end plate 2, an I-shaped block 8 is sleeved in the inner cavity of the waist groove 2 7, a pressure roller 9 is rotatably installed on the upper end surface of the I-shaped block 8, a spring seat 10 is fixed to the lower end surface of the lower end plate 2, and a return spring 11 is fixed between the spring seat 10 and the lower end surface of the I-shaped block 8;

[0032] Manually pull the pressing roller 9 to wrap the aerogel membrane assembly 1 around the surface of the connecting tube 3. At this time, the elastic characteristics of the return spring 11 pull the sliding block 8 to slide in the waist groove 7, so that it drives the pressing roller 9 to squeeze the surface of the aerogel membrane assembly 1 to prevent the aerogel membrane assembly 1 from becoming loose.

[0033] Manually connect the threaded tube 4 at the bottom of the upper end plate 5 with the inner cavity of the connecting tube 3, so as to assemble the upper end plate 5 with the lower end plate 2, so that the upper end plate 5 and the lower end plate 2 clamp and fix the two sides of the aerogel membrane assembly 1;

[0034] When it is needed, the aerogel membrane assembly 1 is manually pulled, and the aerogel membrane assembly 1 is taken out from the surface of the winding assembly, and the taken out aerogel membrane assembly 1 is attached to the surface of the lithium battery.

[0035] Furthermore, the lower end plate 2 is movably connected to the lower end of the aerogel membrane assembly 1 , and the upper end plate 5 is movably connected to the upper end of the aerogel membrane assembly 1 .

[0036] Furthermore, the upper end plate 5 forms an assembleable structure between the threaded barrels 4 .

[0037] Furthermore, the aerogel membrane assembly 1 is wound and rolled up on the surface of the connecting tube 3 .

[0038] Furthermore, the upper end of the pressing roller 9 is sleeved with the inner cavity of the waist groove 6, and the pressing roller 9 is movably connected to the surface of the aerogel membrane assembly 1.

[0039] Furthermore, the pressing roller 9 forms a movable structure between the I-shaped block 8 and the waist groove 7 .

[0040] Furthermore, the waist groove 7 forms an elastic telescopic structure with the return spring 11 and the spring seat 10 .

[0041] Working principle: Before use, first manually pull the pressure roller 9 to wrap the aerogel membrane assembly 1 around the surface of the connecting tube 3. At this time, through the elastic characteristics of the reset spring 11, the sliding block 8 is pulled to slide in the waist groove 7, so that it drives the pressure roller 9 to squeeze the surface of the aerogel membrane assembly 1 to prevent the aerogel membrane assembly 1 from becoming loose. Manually connect the threaded tube 4 at the bottom end of the upper end plate 5 with the inner cavity of the connecting tube 3, so as to assemble the upper end plate 5 and the lower end plate 2, so that the upper end plate 5 and the lower end plate 2 clamp and fix the two sides of the aerogel membrane assembly 1. When it is needed, manually pull the aerogel membrane assembly 1, take it out from the surface of the winding assembly, and fit the taken out aerogel membrane assembly 1 on the surface of the lithium battery. This completes the working principle of the utility model.

[0042] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. An aerogel thermal insulation film structure for a lithium battery, comprising an aerogel film assembly (1), a winding assembly and a pressing assembly, characterized in that: The aerogel film assembly (1) comprises a base layer (101), a phase change layer (102), a heat insulation layer (103), an adhesive layer (104) and a release film layer (105) arranged from the inside to the outside; The winding assembly comprises a lower end plate (2), a connecting tube (3) being fixed to the upper end surface of the lower end plate (2), a threaded tube (4) being threadedly meshed in the inner cavity of the connecting tube (3), an upper end plate (5) being fixed to the upper end surface of the threaded tube (4), a waist groove (6) being provided on one side of the upper end plate (5), a waist groove (7) being provided on one side of the lower end plate (2), an I-shaped block (8) being sleeved in the inner cavity of the waist groove (7), a pressure roller (9) being rotatably mounted on the upper end surface of the I-shaped block (8), a spring seat (10) being fixed to the lower end surface of the lower end plate (2), and a return spring (11) being fixed between the spring seat (10) and the lower end surface of the I-shaped block (8).

2. The aerogel thermal insulation film structure for lithium batteries according to claim 1, characterized in that: The lower end plate (2) is movably connected to the lower end of the aerogel membrane assembly (1), and the upper end plate (5) is movably connected to the upper end of the aerogel membrane assembly (1).

3. The aerogel thermal insulation film structure for lithium battery according to claim 1, characterized in that: The upper end plate (5) forms an assembleable structure between the threaded barrels (4) and the threaded barrels (4).

4. The aerogel thermal insulation film structure for lithium battery according to claim 1, characterized in that: The aerogel membrane assembly (1) is wound and rolled onto the surface of the connecting tube (3).

5. The aerogel thermal insulation film structure for lithium batteries according to claim 1, characterized in that: The upper end of the pressing roller (9) is sleeved with the inner cavity of the waist groove (6), and the pressing roller (9) is movably connected to the surface of the aerogel membrane assembly (1).

6. The aerogel thermal insulation film structure for lithium battery according to claim 1, characterized in that: The pressing roller (9) forms a movable structure between the I-shaped block (8) and the second waist groove (7).

7. The aerogel thermal insulation film structure for lithium battery according to claim 1, characterized in that: The waist groove 2 (7) forms an elastic telescopic structure through the return spring (11) and the spring seat (10).

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