Battery cell protection film

Abstract

The utility model discloses a battery electric core protection film relates to electric core protection film technical field, including respectively being used for pasting in the protection film main part of electric core two side surfaces, and the protection film main part includes base material layer and voltage resistance layer, and the one side of base material layer sets up the protection layer, and the protection layer protruding is provided with a plurality of protruding portions, and the center position of antistatic layer is inlayed with static electricity dredge main line, and the upper and lower ends of static electricity dredge main line are equipped with a plurality of static electricity dredge branch lines, the utility model provides through setting up the protection layer and having the elastic protruding portion, makes protection film have the buffer function, and the expansion force of buffer effect arrives the shell, avoids the deformation of shell. Meanwhile, the protection film is provided with an antistatic layer and inlayed and arranged with a static electricity dredge main line and a plurality of static electricity dredge branch lines, the static electricity generated on the surface of touch screen is led away in time through the static electricity dredge main line and the static electricity dredge branch line, the static electricity is prevented from gathering on the surface of protection film and adsorbing dust, and the antistatic performance of protection film is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery cell protective film technology, specifically to a battery cell protective film. Background Technology

[0002] A battery cell protective film is a protective film wrapped around the outside of a battery cell to protect it. However, existing battery cell protective films have poor antistatic properties, resulting in insufficient safety protection for the product during use. Furthermore, during battery use, due to changes in the physical forces of the cell materials themselves or the accumulation of negative reaction products inside the cell, the cell continuously expands. Under the pressure of this expansion, the outer casing bulges. The protective film cannot buffer this expansion force, which can easily damage the entire battery structure, thus posing a safety hazard. Summary of the Invention

[0003] To address the problems of existing technologies, this utility model provides a battery cell protective film, comprising a protective film body for attaching to the outer surfaces of both sides of the battery cell. The protective film body includes a biodegradable substrate layer and a voltage-resistant layer. A protective layer is bonded to the side of the substrate layer closest to the battery cell. The protective layer has a plurality of protrusions that are elastic. An antistatic layer is bonded to the side of the substrate layer away from the battery cell, and a wear-resistant layer is bonded to the side of the antistatic layer away from the substrate layer. A main electrostatic conductive line is embedded in the center of the surface of the antistatic layer, running through the front and rear ends. Multiple electrostatic conductive branch lines are provided on the surface of the antistatic layer at the upper and lower ends of the main electrostatic conductive line. One end of each electrostatic conductive branch line extends to the edge of the surface of the antistatic layer, and the other end of each electrostatic conductive branch line is connected to the main electrostatic conductive line.

[0004] A further option is that the cross-section of the protrusion is any one of trapezoidal, arc-shaped, triangular, or rectangular.

[0005] A further embodiment is that several of the protrusions are arranged in several rows along the length of the protective layer, and the protrusions in adjacent rows are staggered.

[0006] A further option is that the thickness of the antistatic layer is 0.15mm-0.40mm.

[0007] A further embodiment is that the substrate layer comprises, in sequence, a PLA film layer, a PBAT film layer, and a biodegradable glass fiber layer.

[0008] A further option is to attach a high-temperature resistant layer to the side of the wear-resistant layer away from the antistatic layer.

[0009] A further option is to bond the voltage-resistant layer to the side of the high-temperature resistant layer away from the wear-resistant layer.

[0010] The beneficial effects of this utility model are as follows: The protective film provided by this utility model has a protective layer and elastic protrusions, which gives the protective film a buffer function. When the battery cell expands, the battery cell will press against the protrusions and squeeze the protrusions under the action of expansion force. At this time, the protrusions will be compressed by force, so that the entire protective film can buffer the expansion force acting on the shell and prevent the shell from deforming.

[0011] The protective film of this utility model is provided with an anti-static layer, and an electrostatic discharge main line and several electrostatic discharge branch lines are embedded in the surface of the anti-static layer. The electrostatic discharge main line and electrostatic discharge branch lines conduct away the static electricity generated on the surface of the touch screen in a timely manner, preventing static electricity from accumulating on the surface of the protective film and attracting dust, thereby improving the anti-static performance of the protective film. Attached Figure Description

[0012] Figure 1 A side view of the protective film provided in this embodiment of the invention, showing the protective film applied to both sides of the battery cell. Figure 2 This is a side view of the substrate layer provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of the main structure of the battery cell provided in an embodiment of the present utility model; Figure labeling: 1-Battery cell; 20-Substrate layer; 200-PLA film layer; 201-PBAT film layer; 202-Biodegradable glass fiber layer; 21-Protective layer; 210-Protrusion; 22-Antistatic layer; 220-Main static electricity conduction line; 221-Branch static electricity conduction line; 23-Abrasion-resistant layer; 24-High temperature resistant layer; 25-Voltage resistant layer. Detailed Implementation

[0013] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0014] like Figure 1-3 As shown, one embodiment of the present invention discloses a battery cell protective film, including protective film bodies for attaching to the outer surfaces of both sides of the battery cell 1.

[0015] The protective film in this embodiment serves to shape the battery cell, facilitating its installation into the casing. It also prevents damage during installation. Furthermore, the overall shape of the protective film conforms to the shape of the battery cell.

[0016] The protective film body includes a biodegradable substrate layer 20 and a voltage-resistant layer 25. A protective layer 21 is bonded to the side of the substrate layer 20 near the battery cell 1. Several protrusions 210 are provided on the protective layer 21, and the protrusions 210 are elastic. It should be noted that because the protrusions of the protective layer are elastic, the protective film has a buffering function. When the battery cell expands, the battery cell will press against the protrusions and squeeze the protrusions under the action of expansion force. At this time, the protrusions will be compressed by force, so that the entire protective film can buffer the expansion force acting on the outer shell and prevent the outer shell from deforming.

[0017] An antistatic layer 22 is bonded to the side of the substrate layer 20 away from the battery cell 1. A main electrostatic discharge (ESD) conductor 220, running from front to back, is embedded in the center of the surface of the ESD layer 22. Multiple ESD branch lines 221 are located at the upper and lower ends of the main ESD conductor 220 on the surface of the ESD layer 22. One end of each branch line 221 extends to the edge of the surface of the ESD layer 22, and the other end connects to the main ESD conductor 230. The thickness of the ESD layer 22 is 0.15mm-0.40mm.

[0018] In this embodiment, the protective film is provided with an anti-static layer, and a main electrostatic discharge line and several branch electrostatic discharge lines are embedded in the surface of the anti-static layer. The main electrostatic discharge line and the branch electrostatic discharge lines conduct away the static electricity generated on the surface of the touch screen in a timely manner, preventing static electricity from accumulating on the surface of the protective film and attracting dust, thereby improving the anti-static performance of the protective film.

[0019] A wear-resistant layer 23 is bonded to the side of the antistatic layer 22 away from the substrate layer 20; the wear-resistant layer is a carbon crystal wear-resistant layer.

[0020] In this embodiment, the protective film is provided with a wear-resistant layer to improve its wear resistance.

[0021] The cross-section of the protrusion 210 is any one of trapezoidal, arc-shaped, triangular or rectangular.

[0022] In this embodiment, the cross-section of the protrusion is arc-shaped. When the cross-section of the protrusion is arc-shaped, the contact area between the protrusion and the battery cell is larger, resulting in higher battery stability.

[0023] In this embodiment, the protrusions 210 are distributed in a dot matrix pattern, that is, the protrusions 210 are arranged in several rows along the length of the protective layer 21, and the protrusions 210 in adjacent rows are staggered.

[0024] This embodiment, through the above-described configuration, ensures that when any part of the battery cell expands, the battery cell can press against the protrusion and squeeze the protrusion under the action of the expansion force, thus buffering the expansion force acting on the outer casing and preventing the outer casing from deforming.

[0025] In this embodiment, the substrate layer 20 comprises, from top to bottom, a PLA film layer 200, a PBAT film layer 201, and a biodegradable glass fiber layer 202, which are bonded together sequentially. The biodegradable glass fiber layer 202 is also bonded to the protective layer 21.

[0026] This embodiment uses a substrate comprising a PLA film layer, a PBAT film layer, and a biodegradable glass fiber layer. By utilizing the biodegradable and environmentally friendly properties of the PLA film, PBAT film, and biodegradable glass fiber, the substrate can be automatically degraded into non-toxic and harmless substances after the protective film is used and discarded. Compared with non-degradable substrates such as PET or PVC, it will not pollute the environment and has good biocompatibility.

[0027] In this embodiment, a high-temperature resistant layer 24 is bonded to the side of the wear-resistant layer 23 away from the antistatic layer 22. The high-temperature resistant layer is made of ceramic composite material.

[0028] This embodiment effectively improves the high-temperature resistance of the protective film by setting a high-temperature resistant layer.

[0029] In this embodiment, the voltage-resistant layer 25 is bonded to the side of the high-temperature resistant layer 24 away from the wear-resistant layer 23. The voltage-resistant layer is a ceramic sheet.

[0030] This embodiment effectively enhances the voltage resistance of the protective film by setting a voltage-resistant layer, thereby improving the high-voltage resistance performance of the protective film.

[0031] Finally, it should be noted that the above description only details specific embodiments of this utility model. However, this utility model is not limited to the specific embodiments described above. Equivalent modifications and substitutions made to this utility model by those skilled in the art are also within the scope of this utility model. Therefore, all equivalent changes and modifications made without departing from the spirit and scope of this utility model are covered within the scope of this utility model.

Claims

1. A battery cell protective film, comprising a protective film body for attaching to the outer surfaces of both sides of the battery cell (1), characterized in that: The protective film body includes a biodegradable substrate layer (20) and a voltage-resistant layer (25). A protective layer (21) is bonded to the side of the substrate layer (20) near the battery cell (1). A plurality of protrusions (210) are provided on the protective layer (21), and the protrusions (210) are elastic. An antistatic layer (22) is bonded to the side of the substrate layer (20) away from the battery cell (1), and a wear-resistant layer (23) is bonded to the side of the antistatic layer (22) away from the substrate layer (20). An electrostatic conductive main line (220) running through the front and rear ends is embedded in the center of the surface of the antistatic layer (22). Multiple electrostatic conductive branch lines (221) are provided at the upper and lower ends of the electrostatic conductive main line (220) on the surface of the antistatic layer (22). One end of the electrostatic conductive branch line (221) extends to the edge of the surface of the antistatic layer (22), and the other end of the electrostatic conductive branch line (221) is connected to the electrostatic conductive main line (220).

2. The battery cell protective film according to claim 1, characterized in that: The cross-section of the protrusion (210) is any one of trapezoidal, arc-shaped, triangular or rectangular.

3. The battery cell protective film according to claim 2, characterized in that: Several of the protrusions (210) are arranged in several rows along the length of the protective layer (21), and the protrusions (210) in adjacent rows are staggered.

4. The battery cell protective film according to claim 1, characterized in that: The thickness of the antistatic layer (22) is 0.15mm-0.40mm.

5. A battery cell protective film according to claim 1, characterized in that: The substrate layer (20) includes a PLA film layer (200), a PBAT film layer (201) and a biodegradable glass fiber layer (202) bonded together in sequence.

6. The battery cell protective film according to claim 1, characterized in that: A high-temperature resistant layer (24) is bonded to the side of the wear-resistant layer (23) away from the antistatic layer (22).

7. A battery cell protective film according to claim 1, characterized in that: The voltage-resistant layer (25) is bonded to the side of the high-temperature resistant layer (24) away from the wear-resistant layer (23).

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