Battery and battery coating method

Abstract

The invention provides a battery and a battery film coating method, the battery comprises a shell, a protective film and an insulating film, the shell comprises a top plate and a bottom plate which are oppositely arranged along the height direction of the battery, two first side plates which are oppositely arranged along the width direction of the battery, and two second side plates which are oppositely arranged along the length direction of the battery, a first battery component is arranged on the top plate, and a second battery component is arranged on the second side plate; a protective film is arranged to wrap a bottom plate and a first side plate of a shell, the protective film is folded at a top plate and a second side plate of the shell and wraps a part of the top plate and a part of the second side plate, the protective film is not in contact with a first battery component and a second battery component, and an insulating film comprises a first insulating sheet and a second insulating sheet; the first insulating sheet covers part of the top plate and is not in contact with the first battery component, and the second insulating sheet covers part of the second side plate and is not in contact with the second battery component, so that the avoidance design of the battery components is realized.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and a method for battery encapsulation. Background Art

[0002] The battery coating is an important component of battery safety and performance, especially in electric vehicles and energy storage systems. The insulation performance of the battery coating has a direct impact on the battery's service life, thermal management effect and overall safety.

[0003] At present, related technologies mostly use U-shaped coating and ring-shaped coating methods to coat batteries. These two methods are easy to implement in conventional structural batteries, but for special structural batteries where functional structures such as pressure relief ports, positive and negative electrodes are arranged in unconventional positions, the coating methods in related technologies are insufficient in flexibility and adaptability. In order to meet special needs, additional processes such as cutting, bonding or welding need to be added, which not only complicates the production process, but also increases manufacturing costs and reduces production efficiency, thereby affecting the market competitiveness of the battery. Summary of the invention

[0004] The embodiments of the present application provide a battery and a method for battery packaging, which are used to solve or at least partially solve the deficiencies of the above-mentioned background technology.

[0005] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0006] A housing, comprising a top plate and a bottom plate arranged opposite to each other in a height direction of the battery, two first side plates arranged opposite to each other in a width direction of the battery, and two second side plates arranged opposite to each other in a length direction of the battery, wherein a first battery component is arranged on the top plate, and a second battery component is arranged on the second side plate;

[0007] a protective film, wrapping the bottom plate and the first side plate, and the protective film is folded and arranged at the top plate and the second side plate of the housing, and wraps a part of the top plate and a part of the second side plate, and the protective film is not in contact with the first battery component and the second battery component;

[0008] The insulating film includes a first insulating sheet and a second insulating sheet, wherein the first insulating sheet covers a portion of the top plate and does not contact the first battery component, and the second insulating sheet covers a portion of the second side plate and does not contact the second battery component.

[0009] In a second aspect, an embodiment of the present application provides a method for packaging a battery, wherein the battery includes a housing, including a top plate and a bottom plate arranged opposite to each other in a height direction of the battery, two first side plates arranged opposite to each other in a width direction of the battery, and two second side plates arranged opposite to each other in a length direction of the battery, wherein a first battery component is arranged on the top plate, and a second battery component is arranged on the second side plate; the method for packaging a battery includes:

[0010] Providing a protective film, and wrapping the bottom plate and the first side plate of the housing with the protective film;

[0011] Folding the protective film at the top plate and the second side plate, and wrapping a portion of the top plate and a portion of the second side plate, while the protective film is not in contact with the first battery component and the second battery component;

[0012] Providing a first insulating sheet, covering a portion of the top plate with the first insulating sheet, and the first insulating sheet is not in contact with the first battery component;

[0013] A second insulating sheet is provided, and the second insulating sheet covers a portion of the second side plate, and the second insulating sheet does not contact the second battery component.

[0014] Beneficial effects of the embodiments of the present application: The embodiments of the present application provide a method for a battery and a battery packaging, the battery comprising a shell, a protective film and an insulating film, the shell comprising a top plate and a bottom plate arranged opposite to each other along the height direction of the battery, two first side plates arranged opposite to each other along the width direction of the battery, and two second side plates arranged opposite to each other along the length direction of the battery, the top plate is provided with a first battery component, and the second side plate is provided with a second battery component; a protective film is provided to wrap the bottom plate and the first side plate of the shell, and the protective film is folded and provided at the top plate and the second side plate of the shell, and wraps part of the top plate and part of the second side plate, the protective film is not in contact with the first battery component and the second battery component, the insulating film comprises a first insulating sheet and a second insulating sheet, the first insulating sheet covers part of the top plate, and the first insulating sheet is not in contact with the first battery component, the second insulating sheet covers part of the second side plate, and the second insulating sheet is not in contact with the second battery component, thereby realizing an avoidance design for the battery components, and solving the problem that the battery packaging method in the related art is difficult to accurately avoid the battery components. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution in this embodiment, the drawings required for use in the description of the embodiment will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A first structural schematic diagram of a battery provided in an embodiment of the present application;

[0017] Figure 2 A first exploded schematic diagram of a battery provided in an embodiment of the present application;

[0018] Figure 3 An assembly diagram of a protective film and a housing provided in an embodiment of the present application;

[0019] Figure 4 The embodiments of the present application provide Figure 3 A front view of the middle protective film and the housing after being assembled in the third direction;

[0020] Figure 5 The embodiments of the present application provide Figure 3 A front view of the middle protective film and the housing after being assembled in the first direction;

[0021] Figure 6 A schematic diagram of a first structure of a first insulating sheet provided in an embodiment of the present application;

[0022] Figure 7 An assembly diagram of a protective film, a first insulating sheet and a housing provided in an embodiment of the present application;

[0023] Figure 8 A second structural schematic diagram of a battery provided in an embodiment of the present application;

[0024] Fig. 9 A third structural schematic diagram of a battery provided in an embodiment of the present application;

[0025] Fig.10 The embodiments of the present application provide Figure 7 A front view of the middle protective film, the first insulating sheet and the housing after being assembled in the third direction;

[0026] Fig.11 A fourth structural schematic diagram of a battery provided in an embodiment of the present application;

[0027] Fig.12 A second explosion diagram of a battery provided in an embodiment of the present application;

[0028] Fig.13 A second structural schematic diagram of the first insulating sheet provided in an embodiment of the present application;

[0029] Fig.14 A flow chart of a battery coating method provided in an embodiment of the present application;

[0030] Figures 15 to 19 for Fig.14 Process flow chart of the coating method for medium-sized batteries.

[0031] Description of Reference Numerals

[0032] 1-battery; 11-housing; 12-protective film; 13-insulating film; 14-functional component; 111-top plate;

[0033] 112-bottom plate; 113-first side plate; 114-second side plate; 121-first folding film;

[0034] 122-second folding film; 123-third folding film; 1221-first folding sub-film; 1222-second folding sub-film; 131-first insulating sheet; 132-second insulating sheet; 1310-first overlapping portion; 1311-first insulating portion; 1312-second insulating portion; 1321-first through hole; 1322-first opening; 13111-first insulating sub-portion;

[0035] 13112 - second insulator portion; 13113 - second through hole; 141 - first battery component; 142 - second battery component. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the directional words such as "upper" and "lower" used generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0037] Please combine Figure 1 and Figure 2 ;in, Figure 1 A first structural schematic diagram of a battery provided in an embodiment of the present application; Figure 2 This is a first exploded schematic diagram of a battery provided in an embodiment of the present application.

[0038] In one embodiment, the battery 1 includes but is not limited to square batteries, cylindrical batteries, soft-pack batteries or other special-shaped batteries; the battery 1 includes a shell 11, a battery cell module, a protective film 12 and an insulating film 13, the shell 11 includes a top plate 111 and a bottom plate 112 relatively arranged along the height direction of the battery 1, two first side plates 113 relatively arranged along the width direction of the battery 1, and two second side plates 114 relatively arranged along the length direction of the battery 1, the area of ​​the first side plate 113 is larger than the area of ​​the second side plate 114, a first battery component 141 is arranged on the top plate 111, and a second battery component 142 is arranged on the second side plate 114, two first side plates 113 and two second side plates 114 are arranged around the edge of the bottom plate 112 to form a accommodating cavity, the battery cell module is arranged in the accommodating cavity, and the battery cell module includes a plurality of stacked battery cells.

[0039] The protective film 12 wraps the bottom plate 112 and the first side plate 113, and the protective film 12 is folded at the top plate 111 and the second side plate 114 of the shell 11, and wraps part of the top plate 111 and part of the second side plate 114, and the protective film 12 is not in contact with the first battery component 141 and the second battery component 142; the insulating film 13 includes a first insulating sheet 131 and a second insulating sheet 132, the first insulating sheet 131 covers part of the top plate 111, and the first insulating sheet 131 is not in contact with the first battery component 141, and the second insulating sheet 132 covers part of the second side plate 114, and the second insulating sheet 132 is not in contact with the second battery component 142.

[0040] The present embodiment does not impose any specific restrictions on the length direction, width direction and height direction of the battery. However, in order to better illustrate the innovation of the present embodiment, the present embodiment assumes that the battery 1 is a square battery, and the length direction of the battery is Figure 1 The X direction of the battery is Figure 1 In the Y direction, the height direction of the battery is Figure 1 The technical solution of the present application is illustrated by taking the Z direction in FIG.

[0041] Specifically, the first battery component 141 and the second battery component 142 are both functional components 14 of the battery 1. The first battery component 141 includes but is not limited to at least one of a pressure relief port, an explosion-proof valve, a temperature sensor interface, a positive electrode column and a negative electrode column. The second battery component 142 includes but is not limited to at least one of a pressure relief port, an explosion-proof valve, a temperature sensor interface, a positive electrode column and a negative electrode column. This embodiment takes the first battery component 141 as an explosion-proof valve and the second battery component 142 including a positive electrode column and a negative electrode column as an example to illustrate the technical solution of the present application.

[0042] It should be noted that in the relevant technology, the positive and negative poles of the battery are located at the top of the battery and are distributed in pairs on two opposite sides of the battery. The explosion-proof valve is set at the top or side of the battery so as to release the pressure in time when the internal pressure is too high to prevent the battery from being damaged or exploding. Among them, the relevant technology mostly uses U-shaped and ring-shaped coating methods to coat the battery. However, for batteries with special positions of functional components, such as special structure batteries where the positive and negative poles or the explosion-proof valve are not in the regular position at the top, it is difficult to achieve precise avoidance using conventional coating methods, resulting in insufficient adaptability and low coating efficiency, and may also increase material waste and production costs.

[0043] In this embodiment, the insulating film 13 and the protective film 12 together achieve effective insulation isolation of the battery 1 , ensuring that the battery 1 is not disturbed or damaged by the outside world during normal operation, thereby maintaining the safety and stability of the battery 1 .

[0044] It can be understood that in this embodiment, the protective film 12 is provided to wrap the bottom plate 112 and the first side plate 113, and the protective film 12 wraps part of the top plate 111 and part of the second side plate 114 by folding at the top plate 111 and the second side plate 114, and the protective film 12 is not in contact with the first battery component 141 and the second battery component 142, thereby avoiding direct contact between the protective film 12 and the functional component 14 of the battery 1, and preventing the risk of functional failure of the functional component 14 due to the protective film 12 being tightly attached to or covering the functional component 14 of the battery 1.

[0045] At the same time, by adopting the folding method, the protective film 12 can flexibly adapt to the geometric shapes of the bottom plate 112 and the two first side plates 113, avoiding complex cutting and redundant processing of the protective film 12, making the film wrapping operation simpler and improving efficiency.

[0046] In addition, by setting the insulating film 13 to include a first insulating sheet 131 and a second insulating sheet 132, the first insulating sheet 131 covers a portion of the top plate 111, the second insulating sheet 132 covers a portion of the second side plate 114, and the insulating film 13 and the corresponding functional components 14 (first battery component 141, second battery component 142) maintain a non-contact state, thereby preventing the functional components 14 from failing due to insulation interference; at the same time, by avoiding the flexible design of the functional components 14, the insulating film 13 can be adapted to batteries 1 of different shapes and structures, which can adapt to conventional batteries 1 and meet the requirements of special batteries 1 with irregular positions of functional components 14, thereby reducing process complexity and improving production efficiency.

[0047] Please combine Figure 1 , Figure 2 , Figure 3 and Figure 4 ;in, Figure 3 An assembly diagram of a protective film and a housing provided in an embodiment of the present application; Figure 4 The embodiments of the present application provide Figure 3 A front view of the protective film and the shell after assembly in the first direction.

[0048] In one embodiment, the protective film 12 is folded and arranged at the junction of the first side plate 113 and the second side plate 114, and the protective film 12 includes a first folding film 121, and the first folding film 121 is arranged on the second side plate 114; wherein, along the width direction of the battery 1, the length H1 of the first folding film 121 is greater than 2 mm, thereby ensuring the wrapping accuracy of the protective film 12 and improving the safety, stability and production efficiency of the battery 1.

[0049] Specifically, the protective film 12 is folded at the junction of the first side panel 113 and the second side panel 114, so that the protective film 12 not only covers the first side panel 113 of the shell 11, but also forms a first folding film 121 covering a portion of the second side panel 114 by folding, thereby helping to improve the stability of the fit between the protective film 12 and the shell 11, preventing it from detaching due to external force or movement of the battery 1, and ensuring long-term protection of the shell 11.

[0050] At the same time, in the width direction of the battery 1, the length H1 of the first folding film 121 is greater than 2 mm, and the protective film 12 has sufficient coverage on the second side panel 114, thereby ensuring that the protective film 12 can effectively cover a portion of the second side panel 114 without contacting the second battery component 142. By adjusting the length H1 of the first folding film 121, the protective film 12 can be adapted to various battery 1 shapes and sizes, especially special batteries 1 with irregular positions of functional components 14; and, by folding to form the first folding film 121 covering a portion of the second side panel 114, the process of additional cutting or splicing of films used in the related art can be avoided, thereby improving efficiency.

[0051] Please combine Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ;in, Figure 5 The embodiments of the present application provide Figure 3 A top view of the protective film and the shell after assembly in the third direction.

[0052] In one embodiment, the protective film 12 is folded and arranged at the junction of the first side panel 113 and the top panel 111, and the protective film 12 includes a second folding film 122, and at least a portion of the second folding film 122 is arranged on the top panel 111, so that the protective film 12 can provide additional protection for the shell 11 at the junction of the first side panel 113 and the top panel 111.

[0053] Specifically, the protective film 12 includes a second folding film 122, and at least a portion of the second folding film 122 is arranged on the top plate 111, thereby strengthening the protection of the top plate 111 by the protective film 12 and preventing external factors from causing damage to the top plate 111; at the same time, by arranging the protective film 12 to be folded at the junction of the first side plate 113 and the top plate 111, the protective film 12 can be flexibly adapted to different battery 1 structures, thereby improving the adaptability of the protective film 12.

[0054] Please combine Figures 1 to 5In one embodiment, the second folding film 122 is folded at the junction of the top plate 111 and the second side plate 114, and the second folding film 122 includes a first folding sub-membrane 1221 and a second folding sub-membrane 1222, the first folding sub-membrane 1221 is arranged on the top plate 111, and the second folding sub-membrane 1222 is arranged on the second side plate 114; wherein the orthographic projection of the second folding sub-membrane 1222 on the second side plate 114 overlaps with at least part of the orthographic projection of the first folding film 121 on the second side plate 114, so that the protective film 12 provides protection to the second side plate 114 in multiple directions.

[0055] Specifically, the first folding sub-membrane 1221 is arranged on the top plate 111, and the second folding sub-membrane 1222 is arranged on the second side plate 114, so that the protective film 12 can better adapt to the shape and structure of the shell 11, ensuring that the protective film 12 provides protection for the shell 11 in multiple directions; wherein, the orthographic projection of the second folding sub-membrane 1222 on the second side plate 114 overlaps with the orthographic projection of at least part of the first folding film 121 on the second side plate 114, and the second folding sub-membrane 1222 and part of the first folding film 121 form a laminated structure, so that the protective film 12 covers the local area on the second side plate 114 more fully, avoiding the possible loosening of the local area of ​​the protective film 12.

[0056] At the same time, the protective film 12 of the laminated structure has stronger mechanical strength than a single-layer film, and can effectively prevent poor contact between the protective film 12 and the shell 11 under vibration, impact or other external forces, which helps to avoid loosening or damage of the protective film 12 caused by external forces, thereby improving the overall safety of the battery 1; and, compared with the related art, which uses cutting to remove the edges and waste of the protective film 12, this embodiment uses a folding design to make the shape and size of the protective film 12 more flexibly adapt to the contour of the shell 11, without the need for complicated cutting, thereby reducing unnecessary material waste and reducing production costs.

[0057] Please combine Figures 1 to 5 In one embodiment, along the width direction of the battery 1, the length H2 of the first folding sub-membrane 1221 is greater than 3 mm, thereby ensuring that the protective film 12 can effectively cover a partial area of ​​the top plate 111 without contacting the first battery component 141, avoiding the risk of incomplete or insufficient coverage by the protective film 12.

[0058] Along the height direction of the battery 1, the length H3 of the second folding sub-membrane 1222 is greater than 1 mm, thereby ensuring that the protective film 12 further covers a partial area of ​​the second side plate 114 without contacting the second battery component 142, avoiding the risk of incomplete or insufficient coverage by the protective film 12.

[0059] It can be understood that by adjusting the length H2 of the first folding sub-membrane 1221 and the length H3 of the second folding sub-membrane 1222, the coverage range of the protective film 12 can be controlled to adapt to the shapes and sizes of various shells 11, thereby enhancing the adaptability of the protective film 12 to different battery 1 structures, and being suitable for various battery 1 shapes and sizes, especially special batteries 1 with irregular positions of functional components 14, and will not interfere with the irregular functional components 14 in the battery 1; at the same time, the protective film 12 can cover a wider area, especially the edges and seams of the shell 11, thereby reducing the functional failure or safety hazards of the battery 1 caused by environmental factors (such as moisture, dust, etc.).

[0060] Please combine Figures 1 to 5 ; In one embodiment, the protective film 12 is folded at the junction of the bottom plate 112 and the second side plate 114, and the protective film 12 includes a third folding film 123, and the third folding film 123 is arranged on the second side plate 114, and the orthographic projection of the third folding film 123 arranged on the second side plate 114 overlaps with the orthographic projection of at least part of the first folding film 121 on the second side plate 114; wherein, along the height direction of the battery 1, the length H4 of the third folding film 123 is greater than 1 mm, so that at the junction of the bottom plate 112 and the second side plate 114, through the folding design of the third folding film 123, the protective film 12 can better cover and fit the junction area between the bottom plate 112 and the second side plate 114.

[0061] It can be understood that by setting the length H4 of the third folding film 123 in the height direction of the battery 1 to be greater than 1 mm, it is ensured that the third folding film 123 further covers a partial area of ​​the second side plate 114 without contacting the second battery component 142, thereby avoiding the risk of incomplete or insufficient coverage by the protective film 12.

[0062] At the same time, the third folding film 123 is arranged on the second side panel 114, and the orthographic projection of the third folding film 123 on the second side panel 114 overlaps with the orthographic projection of at least part of the first folding film 121 on the second side panel 114. The third folding sub-membrane and part of the first folding film 121 form a laminated structure, so that the protective film 12 covers the local area on the second side panel 114 more fully, avoiding the possible loosening of the protective film 12.

[0063] Please combine Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 ;in, Figure 6 A schematic diagram of a first structure of a first insulating sheet provided in an embodiment of the present application; Figure 7 An assembly diagram of a protective film, a first insulating sheet and a housing provided in an embodiment of the present application.

[0064] In one embodiment, the insulating film 13 is arranged on a side of the protective film 12 away from the shell 11, the first insulating sheet 131 includes two first insulating parts 1311 arranged at intervals, the first insulating part 1311 is folded at the junction of the top plate 111 and the second side plate 114, the first insulating part 1311 includes a first insulator part 13111 and a second insulator part 13112, the first insulator part 13111 is arranged on the top plate 111, and the second insulator part 13112 is arranged on the second side plate 114.

[0065] Among them, the orthographic projection of the first insulator part 13111 on the top plate 111 covers at least part of the orthographic projection of the first folding sub-membrane 1221 on the top plate 111, and the orthographic projection of the second insulator part 13112 on the second side plate 114 covers the orthographic projection of the second folding sub-membrane 1222 on the second side plate 114, thereby improving the insulation performance at the junction of the top plate 111 and the second side plate 114.

[0066] Specifically, the two first insulating parts 1311 are arranged on both sides of the first battery component 141 along the length direction of the battery 1, and the first insulating parts 1311 do not contact the first battery component 141, thereby preventing the function of the first battery component 141 from failing due to insulation interference; at the same time, by avoiding the first battery component 141, the first insulating part 1311 can be adapted to batteries 1 of different shapes and structures, and can be adapted to conventional batteries 1 as well as meet the requirements of special batteries 1 with irregular positions of functional components 14, thereby reducing process complexity and improving production efficiency.

[0067] Furthermore, the orthographic projection of the first insulator portion 13111 on the top plate 111 covers at least a portion of the orthographic projection of the first folding sub-membrane 1221 on the top plate 111, and the orthographic projection of the second insulator portion 13112 on the second side plate 114 covers the orthographic projection of the second folding sub-membrane 1222 on the second side plate 114. Since the orthographic projection of the second folding sub-membrane 1222 on the second side plate 114 overlaps with the orthographic projection of at least a portion of the first folding film 121 on the second side plate 114, at least a portion of the first folding film 121, the second folding sub-membrane 1222 and the second insulator portion 13112 form a three-layer structure, thereby improving the insulation effect, mechanical strength and stability of the three-layer structure.

[0068] Furthermore, the second insulating sheet 132 is arranged on a side of the second insulator portion 13112 away from the second side plate 114, the orthographic projection of the second insulating sheet 132 on the second side plate 114 covers the orthographic projection of the second insulator portion 13112 on the second side plate 114, and the orthographic projection of the second insulating sheet 132 on the second side plate 114 covers the orthographic projection of the first folding film 121 on the second side plate 114.

[0069] The second insulating sheet 132 is provided with a first through hole 1321, and the first through hole 1321 passes through the second insulating sheet 132. The first through hole 1321 is arranged corresponding to the second battery component 142. The second battery component 142 is located in the first through hole 1321, and the second battery component 142 is spaced apart from the inner wall of the first through hole 1321. By setting the first through hole 1321, an avoidance space is reserved for the second battery component 142, so that the second insulating sheet 132 does not interfere with the function and structural arrangement of the second battery component 142 while maintaining the insulation performance.

[0070] It can be understood that, in this embodiment, the orthographic projection of the second insulating sheet 132 on the second side plate 114 covers the orthographic projection of the second insulator part 13112 on the second side plate 114, and the orthographic projection of the second insulating sheet 132 on the second side plate 114 covers the orthographic projection of the first folding film 121 on the second side plate 114, thereby forming a double-layer or multi-layer insulation structure on the second side plate 114, thereby improving the insulation performance of the shell 11; at the same time, it ensures that the protective film 12 fits tightly with the shell 11, which is not only suitable for conventional batteries 1, but also particularly suitable for batteries 1 with special shapes or complex functional distributions; and there is no requirement for complex processes or materials, which facilitates efficient production and reduces manufacturing costs.

[0071] It should be noted that, in this embodiment, the insulating film 13 is disposed on the side of the protective film 12 away from the housing 11 for illustration only, that is, the above design form is intended to illustrate a possible layout, mainly for demonstrating the synergistic effect of the protective film 12 and the insulating film 13, while ensuring the clarity of the structural design. Figure 8 As shown, the insulating film 13 may be disposed on a side of the protective film 12 close to the housing 11; in another embodiment, as shown Fig. 9 As shown, the second insulator portion 13112 is located on the side of the second insulating sheet 132 away from the second side plate 114; that is, this embodiment does not specifically limit the positional relationship between the first insulating sheet 131, the second insulating sheet 132 and the protective film 12, and the positions of the first insulating sheet 131, the second insulating sheet 132 and the protective film 12 can be adjusted according to actual needs to adapt to different battery 1 structures and functional requirements.

[0072] Furthermore, a QR code is also provided on the second side panel 114, and the QR code is used to identify the serial number or product number of the battery 1, so as to facilitate the tracking and management of the battery 1 in various links. The second insulating sheet 132 is provided with a first opening 1322, and the first opening 1322 passes through the second insulating sheet 132. The first opening 1322 corresponds to the QR code setting on the second side panel, so that the QR code can be exposed after the battery 1 is assembled and remain clear and readable, thereby avoiding the QR code being blocked or unable to be scanned due to being covered by the second insulating sheet 132.

[0073] Please combine Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Fig.10 ;in, Fig.10The embodiments of the present application provide Figure 7 A top view of the middle protective film, the first insulating sheet and the housing after being assembled in the third direction.

[0074] In one embodiment, a first overlapping portion 1310 is provided between the orthographic projection of the first insulating sheet 131 on the top plate 111 and the orthographic projection of the protective film 12 on the top plate 111; wherein, along the width direction of the battery 1, a length H5 of the first overlapping portion 1310 is greater than 0.1 mm, thereby ensuring the covering effect of the first insulator portion 13111 on the top plate 111.

[0075] Specifically, a first overlapping portion 1310 is provided between the orthographic projection of the first insulator portion 13111 on the top plate 111 and the orthographic projection of the first folding sub-membrane 1221 on the top plate 111. Along the width direction of the battery 1, a length H5 of the first overlapping portion 1310 is greater than 0.1 mm. It can be understood that the first overlapping portion 1310 includes the first insulator portion 13111 and the first folding sub-membrane 1221. The superposition of two layers of materials further enhances the insulation effect of the shell 11, thereby avoiding the risk of electrical short circuit between the top plate 111 and possible exposed conductive parts.

[0076] At the same time, by setting the first overlapping portion 1310, the mechanical connection between the first insulator portion 13111 and the first folding sub-membrane 1221 is enhanced, which helps to avoid positional displacement of the first folding sub-membrane 1221 during use; and, by setting the length H5 of the first overlapping portion 1310 to be greater than 0.1 mm in the width direction of the battery 1, the first overlapping portion 1310 is designed to allow a certain degree of assembly error, effectively alleviating the problem of lack of protection that may be caused by alignment deviation.

[0077] Please continue to combine Figures 1 to 10 In one embodiment, the orthographic projection of the first insulating sheet 131 on the top plate 111 does not overlap with the orthographic projection of the first battery component 141 on the top plate 111, and along the length direction of the battery 1, the spacing between the first insulating sheet 131 and the first battery component 141 is greater than 0.1 mm, thereby ensuring that there is no direct contact between the first insulating sheet 131 and the first battery component 141.

[0078] Specifically, the orthographic projection of the first insulator portion 13111 on the top plate 111 does not overlap with the orthographic projection of the first battery component 141 on the top plate 111, thereby effectively avoiding contact between the first insulator portion 13111 and the first battery component 141, and preventing functional failure of the first battery component 141 due to insulation interference; at the same time, through and along the length direction of the battery 1, the spacing between the first insulator portion 13111 and the first battery component 141 is greater than 0.1 mm, thereby allowing the first insulator portion 13111 to have a certain alignment deviation during the manufacturing process, thereby improving the production tolerance and avoiding failure of the insulation or protection function of the first insulator portion 13111.

[0079] It should be noted that, in this embodiment, the first insulating sheet 131 includes two first insulating portions 1311 arranged at intervals, which is only used to illustrate a possible layout, mainly to demonstrate the function of the first insulating sheet 131 and its position in the battery 1. In another embodiment, the layout of the first insulating sheet 131 can be adjusted according to actual needs, such as being designed as a continuous overall structure, a plurality of insulating portions arranged at intervals, or a specific layout customized according to the shape of the battery 1. For example, please combine Fig.11 , Fig.12 and Fig.13 ;in, Fig.11 A fourth structural schematic diagram of a battery provided in an embodiment of the present application; Fig.12 A second explosion diagram of a battery provided in an embodiment of the present application; Fig.13 A second structural schematic diagram of the first insulating sheet provided in an embodiment of the present application.

[0080] In one embodiment, the first insulating sheet 131 includes a first insulating portion 1311 and a second insulating portion 1312, and the first insulating sheet 131 is folded at the junction of the top plate 111 and the second side plate 114, the first insulating portion 1311 is arranged on the top plate 111, and the second insulating portion 1312 is arranged on the second side plate 114; wherein the orthographic projection of the first insulating portion 1311 on the top plate 111 covers at least part of the orthographic projection of the first folding sub-membrane 1221 on the top plate 111, and the orthographic projection of the second insulating portion 1312 on the second side plate 114 covers the orthographic projection of the second folding sub-membrane 1222 on the second side plate 114.

[0081] Specifically, the first insulating part 1311 is provided with a second through hole 13113, the second through hole 13113 penetrates the first insulating part 1311, the first through hole 1321 is arranged corresponding to the first battery component 141, and the first battery component 141 is located in the second through hole 13113, and the second battery component 142 is spaced apart from the inner wall of the second through hole 13113, so that the second through hole 13113 is arranged to reserve an avoidance space for the first battery component 141, so that the first insulating part 1311 does not interfere with the function and structural arrangement of the first battery component 141 while maintaining the insulation performance.

[0082] It can be understood that, compared with the above-mentioned embodiment, this embodiment, by designing the first insulating part 1311 as a continuous integral structure, can not only solve the insulation failure problem that may be caused by the split design (two first insulating parts 1311), but also effectively improve the reliability, safety and production efficiency of the battery 1, ensure the electrical isolation performance in different application scenarios, and reduce the risks caused by design defects.

[0083] Please combine Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figures 14 to 19 ;in, Fig.14 A flow chart of a battery coating method provided in an embodiment of the present application; Figures 15 to 19 for Fig.14 Process flow chart of the coating method for medium-sized batteries.

[0084] This embodiment provides a method for packing a battery film, wherein the battery 1 includes a housing 11, including a top plate 111 and a bottom plate 112 arranged opposite to each other along the height direction of the battery 1, two first side plates 113 arranged opposite to each other along the width direction of the battery 1, and two second side plates 114 arranged opposite to each other along the length direction of the battery 1, wherein a first battery component 141 is arranged on the top plate 111, and a second battery component 142 is arranged on the second side plate 114, such as Fig.15 shown.

[0085] Furthermore, a first battery component 141 is disposed on the top plate 111, a second battery component 142 is disposed on the second side plate 114, two first side plates 113 and two second side plates 114 are arranged around the edge of the bottom plate 112 to form a accommodating cavity, and the battery 1 includes a battery cell module, which is arranged in the accommodating cavity, and the battery cell module includes a plurality of stacked battery cells.

[0086] The battery encapsulation method comprises the following steps:

[0087] Step S10 : providing a protective film 12 , and wrapping the bottom plate 112 and the first side plate 113 of the housing 11 with the protective film 12 .

[0088] Specifically, in step S10, the following steps are included:

[0089] S11: sequentially attach the protective film 12 to the bottom of the housing 11 and the two first side plates 113, and make the portion of the protective film 12 corresponding to the first side plate 113 extend beyond the two ends of the first side plate 113 along the length direction of the battery 1, and the portion of the protective film 12 corresponding to the bottom plate 112 extend beyond the two ends of the bottom plate 112 along the length direction of the battery 1; Fig.16 shown.

[0090] Step S20: Fold the protective film 12 at the top plate 111 and the second side plate 114 and wrap a portion of the top plate 111 and a portion of the second side plate 114 , while the protective film 12 is not in contact with the first battery component 141 and the second battery component 142 .

[0091] Specifically, in step S20, the protective film 12 is folded and set at the junction of the first side panel 113 and the second side panel 114, and the protective film 12 includes a first folding film 121, and the first folding film 121 is set on the second side panel 114; the protective film 12 is folded and set at the junction of the first side panel 113 and the top panel 111, and the protective film 12 includes a second folding film 122, and at least a portion of the second folding film 122 is set on the top panel 111.

[0092] The second folding sub-membrane 1222 is folded and arranged at the junction of the top plate 111 and the second side plate 114, and the second folding film 122 includes a first folding sub-membrane 1221 and a second folding sub-membrane 1222, the first folding sub-membrane 1221 is arranged on the top plate 111, and the second folding sub-membrane 1222 is arranged on the second side plate 114, and the orthographic projection of the second folding sub-membrane 1222 on the second side plate 114 overlaps with at least a part of the orthographic projection of the first folding film 121 on the second side plate 114, as shown in FIG. Fig.16 shown.

[0093] Step S30 : providing a first insulating sheet 131 , and covering a portion of the top plate 111 with the first insulating sheet 131 , while the first insulating sheet 131 is not in contact with the first battery component 141 .

[0094] Specifically, in step S30, the first insulating sheet 131 includes two first insulating parts 1311 arranged at intervals, the first insulating part 1311 is folded at the junction of the top plate 111 and the second side plate 114, the first insulating part 1311 includes a first insulator part 13111 and a second insulator part 13112, the first insulator part 13111 is arranged on the top plate 111, and the second insulator part 13112 is arranged on the second side plate 114.

[0095] The orthographic projection of the first insulator portion 13111 on the top plate 111 covers at least part of the orthographic projection of the first folding sub-membrane 1221 on the top plate 111, and the orthographic projection of the second insulator portion 13112 on the second side plate 114 covers the orthographic projection of the second folding sub-membrane 1222 on the second side plate 114. Fig.18 shown.

[0096] Step S40 : providing a second insulating sheet 132 , and covering a portion of the second side plate 114 with the second insulating sheet 132 , while the second insulating sheet 132 is not in contact with the second battery component 142 .

[0097] Specifically, in the step S40, the second insulating sheet 132 is arranged on the side of the second insulating portion 1312 away from the second side plate 114, the orthographic projection of the second insulating sheet 132 on the second side plate 114 covers the orthographic projection of the second insulator portion 13112 on the second side plate 114, and the orthographic projection of the second insulating sheet 132 on the second side plate 114 covers the orthographic projection of the first folding film 121 on the second side plate 114, thereby achieving insulation protection for the entire housing 11, such as Fig.19 shown.

[0098] It can be understood that the shell 11 is coated by the above-mentioned method of coating the battery 1, and the insulating film 13 and the protective film 12 jointly realize the effective insulation isolation of the battery 1, ensuring that the battery 1 is not disturbed or damaged by the outside world during normal operation, and maintaining the safety and stability of the battery 1; wherein the protective film 12 wraps the bottom plate 112 and the first side plate 113, and the protective film 12 wraps part of the top plate 111 and part of the second side plate 114 by folding at the top plate 111 and the second side plate 114, and the protective film 12 It does not contact the first battery component 141 or the second battery component 142, thereby avoiding direct contact between the protective film 12 and the functional component 14 of the battery 1, and preventing the risk of functional failure of the functional component 14 due to the protective film 12 being close to or covering the functional component 14 of the battery 1; at the same time, by adopting a folding method, the protective film 12 can flexibly adapt to the geometric shapes of the bottom plate 112 and the two first side plates 113, avoiding complex cutting and unnecessary processing of the protective film 12, making the packaging operation simpler and improving efficiency.

[0099] In addition, the first insulating sheet 131 covers a portion of the top plate 111, the second insulating sheet 132 covers a portion of the second side plate 114, and the insulating film 13 and the corresponding functional components 14 (the first battery component 141, the second battery component 142) maintain a non-contact state, thereby preventing the functional components 14 from failing due to insulation interference; at the same time, through the flexible design of avoiding the functional components 14, the insulating film 13 can be adapted to batteries 1 of different shapes and structures, which can adapt to conventional batteries 1 and also meet the requirements of special batteries 1 with irregular positions of functional components 14, thereby reducing process complexity and improving production efficiency.

[0100] The embodiment of the present application provides an electric device, and the electric device includes the battery 1 described in any of the above embodiments. It can be understood that the battery 1 has been described in detail in the above embodiments, and will not be repeated here.

[0101] The electrical equipment includes a battery 1, and the battery module is used as a power supply for the electrical equipment. Therefore, the electrical equipment also has the advantages of the above-mentioned battery 1, which helps to simplify the overall structure of the electrical equipment; wherein, the electrical equipment can be a car, an aircraft, a mechanical production equipment, etc.

[0102] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery, characterized in that: include: A housing, comprising a top plate and a bottom plate arranged opposite to each other in a height direction of the battery, two first side plates arranged opposite to each other in a width direction of the battery, and two second side plates arranged opposite to each other in a length direction of the battery, wherein a first battery component is arranged on the top plate, and a second battery component is arranged on the second side plate; a protective film, wrapping the bottom plate and the first side plate, and the protective film is folded and arranged at the top plate and the second side plate of the housing, and wraps a part of the top plate and a part of the second side plate, and the protective film is not in contact with the first battery component and the second battery component; The insulating film includes a first insulating sheet and a second insulating sheet, wherein the first insulating sheet covers a portion of the top plate and does not contact the first battery component, and the second insulating sheet covers a portion of the second side plate and does not contact the second battery component.

2. The battery according to claim 1, characterized in that The protective film is folded and arranged at the junction of the first side plate and the second side plate, and the protective film comprises a first folded film, and the first folded film is arranged on the second side plate; Wherein, along the width direction of the battery, the length of the first folding film is greater than 2 mm.

3. The battery according to claim 2, characterized in that The protective film is folded and arranged at the junction of the first side plate and the top plate. The protective film includes a second folded film, and at least a portion of the second folded film is arranged on the top plate.

4. The battery according to claim 3, characterized in that The second folding film is folded and arranged at the junction of the top plate and the second side plate, and the second folding film includes a first folding sub-membrane and a second folding sub-membrane, the first folding sub-membrane is arranged on the top plate, and the second folding sub-membrane is arranged on the second side plate; The orthographic projection of the second folding sub-film on the second side panel overlaps with at least a portion of the orthographic projection of the first folding film on the second side panel.

5. The battery according to claim 4, characterized in that Along the width direction of the battery, the length of the first folding sub-membrane is greater than 3 mm; along the height direction of the battery, the length of the second folding sub-membrane is greater than 1 mm.

6. The battery according to claim 4, characterized in that The protective film is folded at the junction of the bottom plate and the second side plate, and the protective film includes a third folded film, which is arranged on the second side plate, and the orthographic projection of the third folded film arranged on the second side plate overlaps with at least a part of the orthographic projection of the first folded film on the second side plate; Wherein, along the height direction of the battery, the length of the third folding film is greater than 1 mm.

7. The battery according to claim 4, characterized in that The first insulating sheet comprises two first insulating parts arranged at intervals, the first insulating part is folded at the junction of the top plate and the second side plate, the first insulating part comprises a first insulator part and a second insulator part, the first insulator part is arranged on the top plate, and the second insulator part is arranged on the second side plate; The orthographic projection of the first insulator part on the top plate covers at least part of the orthographic projection of the first folding sub-membrane on the top plate, and the orthographic projection of the second insulator part on the second side plate covers the orthographic projection of the second folding sub-membrane on the second side plate.

8. The battery according to claim 7, characterized in that The second insulating sheet is arranged on a side of the second insulator portion away from the second side plate, the orthographic projection of the second insulating sheet on the second side plate covers the orthographic projection of the second insulator portion on the second side plate, and the orthographic projection of the second insulating sheet on the second side plate covers the orthographic projection of the first folding film on the second side plate.

9. The battery according to claim 4, characterized in that The first insulating sheet comprises a first insulating portion and a second insulating portion, the first insulating sheet is folded and arranged at the junction of the top plate and the second side plate, the first insulating portion is arranged on the top plate, and the second insulating portion is arranged on the second side plate; The orthographic projection of the first insulating part on the top plate covers at least part of the orthographic projection of the first folding sub-membrane on the top plate, and the orthographic projection of the second insulating part on the second side plate covers the orthographic projection of the second folding sub-membrane on the second side plate.

10. The battery according to any one of claims 1 to 9, characterized in that There is a first overlapping portion between the orthographic projection of the first insulating sheet on the top plate and the orthographic projection of the protective film on the top plate; wherein along the width direction of the battery, the length of the first overlapping portion is greater than 0.1 mm.

11. The battery according to any one of claims 1 to 9, characterized in that The orthographic projection of the first insulating sheet on the top plate does not overlap with the orthographic projection of the first battery component on the top plate, and along the length direction of the battery, the spacing between the first insulating sheet and the first battery component is greater than 0.1 mm.

12. The battery according to any one of claims 1 to 9, characterized in that The insulating film is arranged on a side of the protective film close to the shell; or, the insulating film is arranged on a side of the protective film far from the shell.

13. A method for coating a battery, characterized in that: The battery comprises a housing, comprising a top plate and a bottom plate arranged opposite to each other in a height direction of the battery, two first side plates arranged opposite to each other in a width direction of the battery, and two second side plates arranged opposite to each other in a length direction of the battery, a first battery component being arranged on the top plate, and a second battery component being arranged on the second side plate; the battery comprising method comprises: Providing a protective film, and wrapping the bottom plate and the first side plate of the housing with the protective film; Folding the protective film at the top plate and the second side plate, and wrapping a portion of the top plate and a portion of the second side plate, while the protective film is not in contact with the first battery component and the second battery component; Providing a first insulating sheet, covering a portion of the top plate with the first insulating sheet, and the first insulating sheet is not in contact with the first battery component; A second insulating sheet is provided, and the second insulating sheet covers a portion of the second side plate, and the second insulating sheet does not contact the second battery component.

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