A foldable capacitive film

Abstract

The utility model discloses a kind of folding capacitive film, including film layer;The film layer of the utility model adopts polyimide material, electrode strip of alternately arranged is provided in film layer, the electrode strip is made of metal nanowire, both enhance the folding resistance of film layer, and increase the dielectric constant of film layer, when film layer is folded, base layer one and base layer three are connected in parallel by external circuit, while base layer one and base layer two form capacitor, by once continuous Z-type folding, multiple capacitor units are connected in parallel on physical structure, increase the effective area in unit volume, folding layer is located between two base layers, adopt silica gel, with good flexibility, avoid directly folding to cause film layer crack or break, and can provide covering for exposed electrode edge, prevent interlayer short circuit, convex point and groove are also provided on folding layer, provide positioning folding, make electrode adhere more accurate.

Description

Technical Field

[0001] This utility model relates to the field of capacitor film technology, specifically a foldable capacitor film. Background Technology

[0002] Capacitor film is the core dielectric material used to manufacture film capacitors. It is essentially a thin insulating material based on polymers. In capacitors, it plays a key role in electrical insulation and energy storage. Its applications are very wide, covering industries such as electronics, home appliances, communications, power, electrified railways, hybrid vehicles, wind power generation, and solar power generation. It is mainly used in circuits for power filtering, signal coupling, noise suppression, and power factor correction.

[0003] When existing capacitor films need to be folded, they are usually folded directly. This may cause cracks or breakage at sharp bends, affecting capacitor manufacturing and resulting in higher costs. Utility Model Content

[0004] The purpose of this invention is to provide a foldable capacitor film to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a folded capacitor film, comprising a film layer, wherein the film layer comprises a base layer one, a base layer two, a base layer three, a folded layer one, and a folded layer two, wherein a base layer two is disposed on the right side of the base layer one, a base layer three is disposed on the right side of the base layer two, a folded layer one is disposed between the base layer one and the base layer two, and a folded layer two is disposed between the base layer two and the base layer three.

[0006] Preferably, an electrode strip is provided inside the base layer.

[0007] Preferably, an electrode strip is provided inside the second base layer.

[0008] Preferably, a protrusion is provided on the right side of the bottom end of the folded layer, and a groove is provided on the left side of the bottom end of the folded layer.

[0009] Preferably, the third base layer is provided with an electrode strip identical to that of the first base layer.

[0010] Preferably, a protrusion is provided on the right side of the top end of the second folded layer, and a groove is provided on the left side of the top end of the second folded layer.

[0011] Preferably, the membrane layer adopts a Z-shaped folding method.

[0012] Compared with the prior art, the beneficial effects of this utility model are: The film layer is made of polyimide material, and alternating electrode strips are arranged within the film layer. These electrode strips are made of metal nanowires, which enhances the folding resistance of the film layer and increases its dielectric constant. When the film layer is folded, base layer one and base layer three are connected in parallel through an external circuit. At the same time, base layer one and base layer two form a capacitor. Through a continuous Z-shaped fold, multiple capacitor units are connected in parallel in the physical structure, increasing the effective area per unit volume. The folded layer is located between the two base layers and is made of silicone, which has good flexibility and avoids cracks or breaks in the film layer caused by direct folding. It can also cover the exposed electrode edges to prevent interlayer short circuits. The folded layer is also provided with protrusions and grooves to provide positioning folding and make the electrode fit more accurately. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a structural schematic diagram of the folding process of this utility model.

[0015] Figure 3 This is a schematic diagram of the internal structure of the folded layer of this utility model.

[0016] In the figure: film layer-1, base layer 1-11, electrode strip 1-111, base layer 2-12, electrode strip 2-121, base layer 3-13, folded layer 1-14, protrusion-141, groove-142, folded layer 2-15. Detailed Implementation

[0017] To further explain the technical solution of this utility model, a detailed description is provided below through specific embodiments.

[0018] Please see Figures 1-2 This utility model provides a foldable capacitor film, including film layer 1. Film layer 1 is made of polyimide, which has good flexibility and high temperature resistance. Film layer 1 includes base layer 11, base layer 2 12, base layer 3 13, fold layer 14 and fold layer 2 15. A second base layer 12 is provided on the right side of the first base layer 11, and a third base layer 13 is provided on the right side of the second base layer 12. A first folded layer 14 is bonded between the first base layer 11 and the second base layer 12, and a second folded layer 15 is bonded between the second base layer 12 and the third base layer 13. Both sets of folded layers provide flexibility for the membrane layer 1, preventing cracks or breaks in the membrane layer 1 during folding, and can also cover the exposed electrode strips at the folds to prevent interlayer short circuits. The folded layer 14 is made of silicone, which has good insulation and flexibility. The membrane layer 1 adopts a Z-shaped folding method, which makes the stress distribution more uniform, avoids excessive stress at a single point, and extends the life of the capacitor film.

[0019] Among them, electrode strip 111 is printed inside the base layer 11, electrode strip 121 is printed inside the base layer 2, and electrode strip 111, which is the same as that of base layer 11, is printed inside the base layer 3. The distribution of the remaining electrode strips is as described above. Electrode strip 111 and electrode strip 121 are both made of metal nanowires, which have good flexibility and can improve the dielectric constant of film layer 1, resulting in a higher capacitance value of the finished product.

[0020] Please see Figures 2-3 This utility model provides a foldable capacitor film, including a first foldable layer 14 and a second foldable layer 15. The first foldable layer 14 has a protrusion 141 integrally formed on the right side of its bottom end and a groove 142 integrally formed on the left side of its bottom end. The second foldable layer 15 has a protrusion 141 integrally formed on the right side of its top end and a groove 142 integrally formed on the left side of its top end. The protrusion 141 and the groove 142 can be fitted together, which plays a positioning folding effect when the capacitor film is folded, so that the two sets of electrode strips can be more accurately attached together and avoid electrode misalignment.

[0021] Specifically, the leads are connected to the complete capacitor film, and then the capacitor film is continuously folded together in a Z-shape along the folded layer and through the interlocking of the protrusions 141 and the grooves 142. After folding, it can be used after being sealed on the outside. The electrode strip is made of metal nanowire, which has good folding resistance and improves the dielectric constant of film layer 1, thus increasing the capacitance value of the capacitor. The continuous Z-shaped folding realizes the parallel connection of multiple capacitor units in the physical structure, increases the effective area per unit volume, and improves the capacitance value of the capacitor.

[0022] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A foldable capacitor film, characterized in that: The membrane layer (1) includes a base layer 1 (11), a base layer 2 (12), a base layer 3 (13), a folded layer 1 (14) and a folded layer 2 (15). The base layer 2 (12) is disposed on the right side of the base layer 1 (11), the base layer 3 (13) is disposed on the right side of the base layer 2 (12), the folded layer 1 (14) is disposed between the base layer 1 (11) and the base layer 2 (12), and the folded layer 2 (15) is disposed between the base layer 2 (12) and the base layer 3 (13).

2. The foldable capacitor film according to claim 1, characterized in that: Electrode strips (111) are provided inside the base layer (11).

3. The foldable capacitor film according to claim 1, characterized in that: Electrode strip 2 (121) is provided inside the base layer 2 (12).

4. The foldable capacitor film according to claim 1, characterized in that: A protrusion (141) is provided on the right side of the bottom end of the first folded layer (14), and a groove (142) is provided on the left side of the bottom end of the first folded layer (14).

5. The foldable capacitor film according to claim 2, characterized in that: The third base layer (13) is equipped with an electrode strip (111) that is the same as the first base layer (11).

6. The folded capacitor film according to claim 1, characterized in that: A protrusion (141) is provided on the right side of the top of the second folded layer (15), and a groove (142) is provided on the left side of the top of the second folded layer (15).

7. The folded capacitor film according to claim 1, characterized in that: The membrane layer (1) adopts a Z-shaped folding method.

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