Battery film-wrapping process

Abstract

The present application relates to the technical field of secondary batteries. Disclosed is a battery film-wrapping process, comprising the following steps: attaching an insulating adhesive strip to at least one side face of a battery cell; performing pre-wrapping appearance inspection on the battery cell; unwinding an insulating film, and wrapping the insulating film around the battery cell, such that two side edges of the insulating film wrap onto the side face of the battery cell, and the two side edges of the insulating film are respectively joined to two opposite sides of the insulating adhesive strip, thereby forming an exposed part of the battery cell between the two side edges of the insulating film and outside the insulating adhesive strip; and attaching a top patch to a battery cell cover plate. In the present application, the two side edges of the insulating film are respectively joined to the two opposite sides of the insulating adhesive strip, so as to form the exposed part between the two side edges of the insulating film and outside the insulating adhesive strip, thereby increasing the direct contact and bonding area between a battery cell casing and adjacent components, and thus enhancing the bonding strength between the battery cell and the adjacent components; in addition, the insulating adhesive strip is attached to the side face of the battery cell, thereby ensuring the insulation performance of a battery.

Description

Battery film coating process

[0001] Cross-reference to related applications

[0002] The present application claims priority to the Chinese patent application No. 202410713034.9, filed on June 4, 2024, and entitled "Battery film coating process", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of secondary batteries, in particular to a battery film coating process. BACKGROUND

[0004] To solve the problems of resource shortage of non-renewable energy and environmental pollution, the research and development of electric new energy vehicles have become popular, and secondary batteries are an important component of electric new energy vehicles. For secondary batteries, an insulating film needs to be coated on the outside of the battery. The conventional blue film solution is to directly coat a common blue film on the outside of the battery cell. For batteries with high vibration requirements, the conventional blue film solution is prone to delamination between the battery cell and the EPP (Expanded polypropylene, a foamed material made of polypropylene) and the battery cell and the water-cooled plate during vibration testing. SUMMARY

[0005] Therefore, the present application provides a battery film coating process to solve the problem that the conventional blue film solution is prone to delamination, affecting the insulation performance of the battery.

[0006] The present application provides a battery film coating process, comprising the steps of: pasting an insulating adhesive tape on at least one side surface of a battery cell; performing a pre-film coating appearance inspection on the battery cell; unwinding an insulating film, coating the battery cell with the insulating film, wrapping two side edges of the insulating film on the side surface of the battery cell, and splicing the two side edges of the insulating film with opposite sides of the insulating adhesive tape, respectively, to form a bare part of the battery cell between the two side edges of the insulating film and outside the insulating adhesive tape; and pasting a top patch on a cover plate of the battery cell.

[0007] Beneficial effects: The two side edges of the insulating film are spliced with the opposite sides of the insulating adhesive tape, respectively, to form a bare part between the two side edges of the insulating film and outside the insulating adhesive tape, increase the area of the direct contact and adhesion between the battery cell housing and the adjacent components, and improve the adhesion strength between the battery cell and the adjacent components. Meanwhile, the insulating adhesive tape is pasted on the side surface of the battery cell, which improves the adhesion performance of the battery cell and ensures the insulation performance of the battery.

[0008] In an alternative embodiment, the step of sticking the insulating adhesive tape on at least one side of the battery cell comprises the steps of: placing the battery cell into a fixing device; installing a tape-sticking auxiliary tool on the battery cell, the tape-sticking auxiliary tool being provided with an auxiliary sticking groove; placing the insulating adhesive tape into the auxiliary sticking groove and sticking the insulating adhesive tape on the battery cell; and detecting the battery cell after the insulating adhesive tape is stuck thereon.

[0009] Beneficial effects: the use of the tape-sticking auxiliary tool facilitates more accurate installation of the insulating adhesive tape, thereby ensuring the insulation performance of the battery.

[0010] In an alternative embodiment, the step of detecting the battery cell after the insulating adhesive tape is stuck thereon comprises the steps of: manually inspecting the sticking condition of the insulating adhesive tape; and installing a detection tool to check the length of the insulating adhesive tape on the side of the battery cell.

[0011] Beneficial effects: the checking of the sticking condition of the insulating adhesive tape ensures the insulation performance of the battery; and the checking of the length of the insulating adhesive tape on the side of the battery cell ensures the insulation performance of the battery after the film coating.

[0012] In an alternative embodiment, the step of unwinding the insulating film and coating the battery cell comprises the steps of: unwinding the insulating film; the insulating film being provided with a window; performing CCD detection on the size and position of the window of the insulating film; coating the detected insulating film on the battery cell such that the window corresponds to the other side of the battery cell; and performing CCD detection on the battery cell after the overall film coating.

[0013] Beneficial effects: the coating of the insulating film provided with the window on the battery cell increases the area of the battery cell shell directly bonded with the adjacent components through structural adhesive, thereby improving the bonding strength between the battery cell and the adjacent components; the CCD detection on the size and position of the window of the insulating film and the battery cell after the overall film coating realizes the tolerance control of the window, thereby avoiding the increase of the rework rate of the battery cell.

[0014] In an alternative embodiment, the insulating film comprises a PET blue film and a UV blue film, and the window is provided on the PET blue film; the step of coating the detected insulating film on the battery cell comprises the steps of: coating the battery cell with the PET blue film first, then stacking a plurality of the battery cells, and finally sticking the UV blue film on the plurality of battery cells and covering the position of the window of the PET blue film; or, sticking the UV blue film on the battery cell first, then coating the battery cell with the PET blue film, and arranging the window on the PET blue film to correspond to the UV blue film.

[0015] Beneficial effect: stack a number of PET blue film coated battery cells first, then use a large area of UV blue film to cover the window position on the PET blue film, save the process cycle; first, the UV blue film is wrapped on the battery cell, and then the PET blue film is wrapped on the battery cell to ensure the wrapping effect of the UV blue film on each battery cell.

[0016] In an alternative embodiment, before the UV blue film is pasted on the battery cell, the UV blue film is irradiated and activated, and then the irradiated UV blue film is wrapped on the battery cell within a specified time.

[0017] In an alternative embodiment, the specified time is not more than 10 minutes.

[0018] Beneficial effect: wrapping the UV blue film on the battery cell within a specified time prevents the UV blue film from curing too much, resulting in too low viscosity of the UV blue film, affecting the adhesion strength of the battery cell and adjacent components.

[0019] In an alternative embodiment, the insulating film is a UV blue film, and the unwinding of the insulating film and the wrapping of the battery cell include the steps of: unwinding the insulating film; irradiating the unwound insulating film; and wrapping the irradiated insulating film on the battery cell within a specified time.

[0020] Beneficial effect: using the high viscosity of the UV blue film to improve the adhesion strength of the battery cell and adjacent components and reduce the probability of delamination.

[0021] In an alternative embodiment, the insulating adhesive tape includes a first adhesive segment and a second adhesive segment connected, the first adhesive segment is pasted on the side surface of the battery cell, and the second adhesive segment is pasted on the cover plate of the battery cell after the insulating adhesive tape is bent at the connection between the first adhesive segment and the second adhesive segment.

[0022] Beneficial effect: the two side edges of the insulating adhesive tape are pasted on the side surface of the battery cell and the cover plate of the battery cell respectively, improving the adhesion of the insulating adhesive tape on the battery cell.

[0023] In an alternative embodiment, the length of the first adhesive segment is adjustable.

[0024] Beneficial effect: the length of the first adhesive segment can be adjusted according to actual conditions to ensure the insulation performance of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the accompanying drawings needed to be used in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the accompanying drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0026] FIG. 1 is a flowchart of a battery pack film coating process according to an embodiment of the present application;

[0027] FIG. 2 is a flowchart of a process of pasting an insulating adhesive tape on at least one side of a battery cell according to an embodiment of the present application;

[0028] FIG. 3 is a flowchart of a process of unwinding an insulating film and coating the battery cell according to an embodiment of the present application;

[0029] FIG. 4 is a flowchart of a process of coating the insulating film according to an embodiment of the present application;

[0030] FIG. 5 is a schematic diagram of a battery cell structure for the process of coating the insulating film according to an embodiment of the present application;

[0031] FIG. 6 is another flowchart of a process of coating the insulating film according to an embodiment of the present application;

[0032] FIG. 7 is another schematic diagram of a battery cell structure for the process of coating the insulating film according to an embodiment of the present application;

[0033] FIG. 8 is another flowchart of a process of unwinding the insulating film and coating the battery cell according to an embodiment of the present application;

[0034] FIG. 9 is a schematic diagram of a structure of a battery cell before the insulating film is coated according to an embodiment of the present application;

[0035] FIG. 10 is a schematic diagram of a structure of a battery cell after the insulating film is coated according to an embodiment of the present application;

[0036] FIG. 11 is a schematic diagram of a three-dimensional structure of a side of a battery cell to which an insulating adhesive tape is pasted according to an embodiment of the present application;

[0037] FIG. 12 is a schematic diagram of a planar structure of a side of a battery cell to which an insulating adhesive tape is pasted according to an embodiment of the present application;

[0038] FIG. 13 is a schematic diagram of a planar structure of a side of a battery cell on which a window is opened according to an embodiment of the present application;

[0039] FIG. 14 is a schematic diagram of a structure of a glue pasting auxiliary tool according to an embodiment of the present application;

[0040] FIG. 15 is a flowchart of a process of coating an insulating film according to the related art.

[0041] Label explanation: 10, battery cell; 11, exposed part; 12, first side; 13, second side; 14, third side; 15, fourth side; 20, insulation film; 21, PET blue film; 22, UV blue film; 23, window; 30, insulation adhesive tape; 31, first adhesive section; 32, second adhesive section; 40, adhesive auxiliary tool; 41, auxiliary adhesive groove. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and superiorities of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some, but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0043] The embodiments of the present application will be described below in connection with Figs. 1 to 14.

[0044] According to the embodiments of the present application, a battery film coating process is provided, comprising the steps of:

[0045] At least one side of the battery cell 10 is pasted with an insulation adhesive tape 30;

[0046] The appearance of the battery cell 10 is inspected before film coating;

[0047] The insulation film 20 is unwound, and the battery cell 10 is coated with the insulation film 20, so that two side edges of the insulation film 20 are wrapped on the side of the battery cell 10, and the two side edges of the insulation film 20 are respectively spliced with the opposite two sides of the insulation adhesive tape 30, so that the exposed part 11 is formed between the two side edges of the insulation film 20 and the part of the battery cell 10 outside the insulation adhesive tape 30;

[0048] A top patch is pasted on the battery cell cover plate.

[0049] According to the battery film coating process of the present application, the two side edges of the insulation film 20 are respectively spliced with the opposite two sides of the insulation adhesive tape 30, so as to form the exposed part 11 between the two side edges of the insulation film 20 and the part of the battery cell 10 outside the insulation adhesive tape 30, increase the area of direct contact and adhesion between the battery cell shell and the adjacent components, and improve the adhesion strength between the battery cell 10 and the adjacent components; meanwhile, the insulation adhesive tape 30 is pasted on the side of the battery cell 10, which improves the adhesion performance of the battery cell 10 and ensures the insulation performance of the battery.

[0050] It should be noted that the battery cell 10 is adhered to the adjacent components by using structural adhesive.

[0051] It should be noted that the surface of the insulation film 20 is smooth, so that the adhesion between the structural adhesive and the insulation film 20 is low, thereby reducing the adhesion strength of the battery cell 10 and the adjacent components. Therefore, in the exposed part 11, the battery cell shell is directly adhered to the adjacent components by the structural adhesive, thereby increasing the adhesion strength.

[0052] Specifically, referring to FIG. 12, the battery cell 10 forms the exposed part 11 between the two side edges of the insulation film 20 and outside the insulation adhesive tape 30.

[0053] It should be noted that the larger the exposed part 11 of the battery cell shell, the higher the adhesion strength of the battery cell 10 and the adjacent components, but correspondingly, the insulation performance of the battery is poor. Therefore, the insulation adhesive tape 30 is pasted on the side surface of the battery cell 10 to ensure the insulation performance of the battery.

[0054] It should be noted that in addition to the part of the insulation adhesive tape 30 being pasted on the side surface of the battery cell 10, other parts of the insulation adhesive tape 30 can be pasted on other side surfaces adjacent to the side surface of the battery cell 10 under the premise of ensuring insulation, so as to improve the adhesion stability of the insulation adhesive tape 30.

[0055] It should be noted that, referring to FIG. 15, in the related art, the conventional insulation film coating scheme includes the following steps:

[0056] Inspection before coating the appearance of the battery cell 10;

[0057] Unwinding the insulation film 20 and coating the battery cell 10;

[0058] Pasting the top patch on the battery cell cover plate.

[0059] It should be noted that in the conventional insulation film coating scheme, the insulation film 20 completely coats the battery cell 10, and the adhesion strength of the battery cell 10 and the adjacent components depends on the adhesion strength of the insulation film 20 and the adjacent components, so that in a high-vibration environment, the smooth insulation film 20 and the adjacent components are prone to delamination. Compared with the conventional insulation film coating scheme, the battery cell 10 of the present scheme forms the exposed part 11 between the two side edges of the insulation film 20 and outside the insulation adhesive tape 30, and the battery cell shell is directly adhered to the adjacent components by the structural adhesive in the exposed part 11, thereby increasing the adhesion strength of the battery cell 10 and the adjacent components.

[0060] In one embodiment, as shown in FIG. 11, the insulation adhesive tape 30 includes a first adhesive segment 31 and a second adhesive segment 32 connected and arranged, the first adhesive segment 31 is pasted on the side surface of the battery cell 10, and after the insulation adhesive tape 30 is bent at the connection between the first adhesive segment 31 and the second adhesive segment 32, the second adhesive segment 32 is pasted on the battery cell cover plate.

[0061] Specifically, please refer to FIG. 11, in the embodiment, the insulating adhesive tape 30 is an L-shaped insulating adhesive tape, the first adhesive segment 31 of the insulating adhesive tape 30 is a long side, the second adhesive segment 32 is a short side, and the joint of the first adhesive segment 31 and the second adhesive segment 32 is located at the connecting edge of the side surface of the battery cell 10 and the battery cell cover plate.

[0062] It should be noted that, in the embodiment, the length of the first adhesive segment 31 and the second adhesive segment 32 of the insulating adhesive tape 30 needs to be detected to ensure the insulation performance of the battery.

[0063] It should be noted that, the two side edges of the insulating adhesive tape 30 are respectively pasted on the side surface of the battery cell 10 and the battery cell cover plate, which improves the adhesion of the insulating adhesive tape 30 on the battery cell 10.

[0064] In one embodiment, the length of the first adhesive segment 31 is adjustable.

[0065] It should be noted that, the length of the first adhesive segment 31 can be adjusted according to actual conditions to ensure the insulation performance of the battery.

[0066] In one embodiment, as shown in FIG. 2 and FIG. 14, the step of pasting the insulating adhesive tape 30 on at least one side surface of the battery cell 10 includes: placing the battery cell 10 into a fixing device; installing a pasting auxiliary tool 40 on the battery cell 10, the pasting auxiliary tool 40 is provided with an auxiliary pasting groove 41, placing the insulating adhesive tape 30 in the auxiliary pasting groove 41 and pasting it on the battery cell 10; and detecting the battery cell 10 after pasting the insulating adhesive tape 30.

[0067] Specifically, please refer to FIG. 14, the pasting auxiliary tool 40 is provided with an auxiliary pasting groove 41, after placing the insulating adhesive tape 30 in the auxiliary pasting groove 41, the insulating adhesive tape 30 is smoothed by artificial.

[0068] It should be noted that, by using the pasting auxiliary tool 40, the insulating adhesive tape 30 can be installed more accurately, thereby ensuring the insulation performance of the battery.

[0069] In one embodiment, the step of checking the appearance of the battery cell 10 before coating includes: manually checking the appearance of the battery cell 10; cleaning the surface of the battery cell 10; and shaping the surface of the battery cell 10.

[0070] In one embodiment, as shown in FIG. 2, the step of detecting the battery cell 10 after pasting the insulating adhesive tape 30 includes: manually checking the pasting condition of the insulating adhesive tape 30; and installing a detection tool to check the length of the insulating adhesive tape 30 on the side surface of the battery cell 10.

[0071] It is worth mentioning that the pasting of the insulating tape 30 is checked to ensure the electrical insulation; the length of the insulating tape 30 on the side of the battery cell 10 is checked to ensure the insulation performance of the battery after the coating.

[0072] In one embodiment, as shown in FIG. 3, the step of coating the battery cell 10 with the insulating film 20 includes: unwinding the insulating film 20; the insulating film 20 has a window 23, the size and position of the window 23 of the insulating film 20 are detected by CCD; the detected insulating film 20 is wrapped on the battery cell 10, and the window 23 is arranged corresponding to the other side of the battery cell 10; the battery cell 10 after the whole coating is detected by CCD.

[0073] Specifically, please refer to FIG. 9, in this embodiment, the side where the window 23 of the insulating film 20 is located is arranged opposite to the side where the insulating tape 30 is pasted.

[0074] Of course, in other alternative embodiments, the window 23 of the insulating film 20 can also be arranged on other sides under the premise of ensuring the insulation of the battery.

[0075] Specifically, please refer to FIG. 13, in this embodiment, the insulating film 20 is provided with ten windows 23.

[0076] Of course, in other alternative embodiments, the number of windows 23 of the insulating film 20 can also be adjusted according to actual needs.

[0077] It is worth mentioning that, please refer to FIG. 9 and FIG. 10, taking the positive cover plate as the reference, the side where the window 23 is located is defined as the first side 12, the side where the insulating tape 30 is pasted is defined as the second side 13, and the two sides adjacent to the first side 12 and the second side 13 are defined as the third side 14 and the fourth side 15 respectively. The wrapping method of the insulating film 20 is: taking the first side 12 as the center, after the first side 12 is pasted to the insulating film 20, the two ends of the insulating film 20 are respectively folded to the third side 14 and the fourth side 15, and then the two ends of the insulating film 20 are respectively folded to the second side 13.

[0078] It is worth mentioning that the insulating film 20 provided with the window 23 is wrapped on the battery cell 10, the window 23 on the insulating film 20 increases the area of the battery cell shell directly bonded with the adjacent components through the structural adhesive, thereby improving the bonding strength of the battery cell 10 and the adjacent components; by detecting the size of the window 23 of the insulating film 20, the position of the window 23 and the battery cell 10 after the whole coating by CCD, the tolerance control of the window 23 is realized, and the rework rate of the battery cell 10 is avoided.

[0079] In one embodiment, as shown in FIG. 4 and FIG. 5, the insulating film 20 comprises a PET blue film 21 and a UV blue film 22, the PET blue film 21 is provided with a window 23, and the step of covering the detected insulating film 20 on the battery cell 10 comprises: first, covering the battery cell 10 with the PET blue film 21, then stacking a plurality of battery cells 10, and finally pasting the UV blue film 22 on the plurality of battery cells 10 and covering the position of the window 23 of the PET blue film 21.

[0080] Specifically, the PET blue film 21 is composed of release paper, double-layer adhesive and double-layer PET film.

[0081] Optionally, the release paper is transparent release paper, and the double-layer adhesive is double-layer acrylic adhesive.

[0082] Specifically, the UV blue film 22 is composed of release paper, single-layer UV curing adhesive and single-layer PET.

[0083] It is worth noting that a plurality of battery cells 10 covered with the PET blue film 21 are stacked first, and then the position of the window 23 on the PET blue film 21 is covered with a large-area UV blue film 22, which saves the cycle of the process flow.

[0084] In another embodiment, as shown in FIG. 6 and FIG. 7, the UV blue film 22 is pasted on the battery cell 10 first, and then the PET blue film 21 is covered on the battery cell 10, and the window 23 on the PET blue film 21 is arranged corresponding to the UV blue film 22.

[0085] Specifically, the PET blue film 21 is composed of release paper, double-layer adhesive and double-layer PET film.

[0086] Optionally, the release paper is transparent release paper, and the double-layer adhesive is double-layer acrylic adhesive.

[0087] Specifically, the UV blue film 22 is composed of release paper, single-layer UV curing adhesive and single-layer PET.

[0088] It is worth noting that the UV blue film 22 is covered on the battery cell 10 first, and then the PET blue film 21 is covered on the battery cell 10, which ensures the covering effect of the UV blue film 22 on each battery cell 10.

[0089] In one embodiment, as shown in FIG. 4, before the UV blue film 22 is pasted on the battery cell 10, the UV blue film 22 is first irradiated and activated, and then the irradiated UV blue film 22 is covered on the battery cell 10 within a specified time.

[0090] It is worth noting that the battery cell 10 covered with the UV blue film 22 needs to be aged for five days before performance testing.

[0091] In one embodiment, the specified time is no more than 10 min.

[0092] It should be noted that the viscosity of the UV blue film 22 decreases with the increase of time after the irradiation activation.

[0093] It should be noted that if the UV blue film 22 irradiated for more than 10 minutes is wrapped on the battery cell 10, the UV blue film 22 needs to be removed.

[0094] It should be noted that the UV blue film 22 is wrapped on the battery cell 10 within a specified time, which prevents the UV blue film 22 from being too solidified and thus too low in viscosity, thereby affecting the adhesion strength of the battery cell 10 and adjacent components.

[0095] In another embodiment, as shown in FIG. 8, the insulating film 20 is a UV blue film 22, and the step of wrapping the insulating film 20 on the battery cell 10 includes: unwinding the insulating film 20; irradiating the unwound insulating film 20; and wrapping the irradiated insulating film 20 on the battery cell 10 within a specified time.

[0096] Specifically, the adhesion strength of the battery cell 10 and adjacent components is improved by using the viscosity of the UV blue film 22 after irradiation activation.

[0097] It should be noted that the high viscosity of the UV blue film 22 is used to improve the adhesion strength of the battery cell 10 and adjacent components and reduce the probability of delamination.

[0098] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A battery coating process, characterized by, The method comprises the steps of: attaching an insulating adhesive tape to at least one side of the battery cell; pre-film inspection of the battery cell; unwinding the insulating film, wrapping the battery cell with the insulating film, and wrapping the two side edges of the insulating film to the side of the battery cell, and splicing the two side edges of the insulating film to the opposite sides of the insulating adhesive tape, so that the battery cell forms a bare part between the two side edges of the insulating film and outside the insulating adhesive tape; attaching a top patch to the battery cell cover plate.

2. The battery coating process of claim 1, wherein, The method of attaching an insulating adhesive tape to at least one side of the battery cell comprises the steps of: placing the battery cell in a fixing device; attaching an adhesive tape auxiliary tool to the battery cell, the tool having an auxiliary adhesive slot, placing the insulating adhesive tape in the auxiliary adhesive slot, and attaching the insulating adhesive tape to the battery cell; detecting the battery cell after attaching the insulating adhesive tape.

3. The battery coating process of claim 2, wherein, The method of detecting the battery cell after attaching the insulating adhesive tape comprises the steps of: manually inspecting the attachment of the insulating adhesive tape; attaching a detection tool to check the length of the insulating adhesive tape on the side of the battery cell.

4. The battery coating process of any one of claims 1-3, wherein, The method of unwinding the insulating film and wrapping the battery cell with the insulating film comprises the steps of: unwinding the insulating film; CCD detecting the size and position of the window of the insulating film; wrapping the detected insulating film on the battery cell, with the window corresponding to the other side of the battery cell; CCD detecting the battery cell after overall film wrapping.

5. The battery coating process of claim 4, wherein, The insulating film comprises a PET blue film and a UV blue film, and the PET blue film has a window, and the method of wrapping the detected insulating film on the battery cell comprises the steps of: first wrapping the battery cell with the PET blue film, then stacking several battery cells, and finally attaching the UV blue film on the several battery cells and covering the position of the window of the PET blue film; or first attaching the UV blue film on the battery cell, then wrapping the battery cell with the PET blue film, and arranging the window of the PET blue film corresponding to the UV blue film.

6. The battery coating process of claim 5, wherein, Before attaching the UV blue film on the battery cell, the UV blue film is first irradiated and activated, and then the irradiated UV blue film is wrapped on the battery cell within a specified time.

7. The battery coating process of claim 6, wherein, The specified time is no more than 10 minutes.

8. The battery coating process of any one of claims 1-3, wherein, The insulating film is a UV blue film, and the method of unwinding the insulating film and wrapping the battery cell with the insulating film comprises the steps of: unwinding the insulating film; irradiating the unwound insulating film; wrapping the irradiated insulating film on the battery cell within a specified time.

9. The battery coating process of any one of claims 1-3, wherein, The insulating adhesive tape comprises a first adhesive segment and a second adhesive segment connected, the first adhesive segment is attached to the side of the battery cell, and the second adhesive segment is attached to the battery cell cover plate after the insulating adhesive tape is bent at the connection between the first adhesive segment and the second adhesive segment.

10. The battery coating process of claim 9, wherein, The length of the first adhesive segment is adjustable.

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