Battery monomer, battery and electric equipment

Abstract

The embodiment of the utility model discloses a battery monomer, a battery and electric equipment, and the battery monomer comprises a shell, an end cover and an insulating film, and the end cover is used for covering an opening in the shell; the insulating film comprises an end cover coating area, a shell large surface coating area, a shell small surface coating area and a shell bottom surface coating area, the end cover coating area and the shell large surface coating area are integrally formed, the shell small surface coating area and the shell bottom surface coating area are arranged at the two ends of the shell large surface coating area, and a first notch part is formed between the edge of the shell small surface coating area and the edge of the end cover coating area. And a second notch part is formed between the edge of the shell small surface coating area and the edge of the shell bottom surface coating area. Compared with a traditional film coating mode, the above scheme can reduce space waste caused by a large number of overlapping layers and a large overlapping area of the insulating film outside the shell on the basis of realizing insulating film coating, and is convenient for improving the volume utilization rate of the battery monomer.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery monomer, a battery and an electric device. BACKGROUND

[0002] At present, the battery monomer needs to be coated with a film so that the adjacent battery monomers can be insulated and separated when the battery monomers are integrated in the battery, thereby improving the safety. In the traditional coating method, the large-face coating edge, the top surface and the bottom surface of the battery monomer are all collected on the side surface of the battery monomer, and the multiple coating edges are pasted together after being stacked. However, the stacking of the multiple coating edges will cause the lateral dimension to be larger, especially when wrinkles and buckling occur after stacking, thereby wasting the volume of the battery and affecting the capacity of the battery. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems, the present application provides a battery monomer, a battery and an electric device, which can optimize the coating method of the battery monomer, reduce the occupied space of the battery monomer after coating, so as to improve the capacity of the battery.

[0004] The technical means adopted by the present application to solve the above technical problems is:

[0005] In one aspect, the present application provides a battery monomer, comprising: a shell having an opening; an end cover for covering the opening; an insulating film comprising an integrally formed end cover coating area, a shell large surface coating area, a shell small surface coating area arranged at both ends of the shell large surface coating area and a shell bottom surface coating area, a first gap part being formed between the edge of the shell small surface coating area and the edge of the end cover coating area, and a second gap part being formed between the edge of the shell small surface coating area and the edge of the shell bottom surface coating area.

[0006] In the above application scheme, the first gap part and the second gap part are arranged to reduce the number of overlapping layers and the stacking area between the end cover coating area, the shell small surface coating area and the shell bottom surface coating area. Compared with the traditional coating method, the space waste caused by the large number of overlapping layers and the large stacking area of the insulating film outside the shell can be reduced on the basis of achieving insulating coating, thereby facilitating the volume utilization rate of the battery monomer.

[0007] In some embodiments, an electrode terminal is arranged on the end cover, and a first via hole for exposing the electrode terminal is arranged on the end cover coating area.

[0008] In the above application scheme, the first via hole is arranged so that the electrode terminal can be exposed after the insulating film is coated on the shell, thereby facilitating the subsequent electrical connection.

[0009] In some embodiments, a pressure relief mechanism is arranged on the end cover, and a second via hole is arranged on the end cover covering area for exposing the pressure relief mechanism.

[0010] In the above application scheme, the second via hole is arranged to expose the pressure relief mechanism after the insulating film is covered on the shell, thereby facilitating the subsequent normal use of the pressure relief mechanism.

[0011] In some embodiments, an identification part is arranged on the end cover, and a third via hole is arranged on the end cover covering area for exposing the identification part.

[0012] In the above application scheme, the third via hole is arranged to expose the identification part after the insulating film is covered on the shell, thereby facilitating the subsequent information reading and identification.

[0013] In some embodiments, first reserved parts are arranged at both ends of the end cover covering area, and first creases are arranged between the first reserved parts and the body of the end cover covering area; the width of the first reserved part matches the edge chamfer of the shell.

[0014] In the above application scheme, the first reserved part is arranged to cover the edge chamfer of the shell, thereby reducing the material amount of the end cover covering area for lateral covering, avoiding lateral overlap, or reducing the laminated area after overlap.

[0015] In some embodiments, shell large surface covering areas, shell small surface covering areas, and shell bottom surface covering areas are arranged at both sides of the end cover covering area; first avoiding holes are arranged at the corner intersections between the first reserved parts, the shell large surface covering areas, and the shell small surface covering areas.

[0016] In the above application scheme, the first avoiding hole is arranged to avoid the occurrence of corner position protrusions, wrinkles, and the like of the insulating film after covering, thereby facilitating the film covering operation and improving the external appearance after film covering.

[0017] In some embodiments, a second reserved part is arranged between the end cover covering area and the shell large surface covering area, second creases are arranged at both sides of the second reserved part; and the width of the second reserved part matches the edge chamfer of the shell.

[0018] In the above application scheme, the second reserved part is arranged to cover the edge chamfer of the shell, thereby facilitating the film sticking quality of the insulating film at the edge chamfer position of the shell.

[0019] In some embodiments, second avoiding holes are arranged at the corner intersections between the shell small surface covering areas, the shell large surface covering areas, and the shell bottom surface covering areas.

[0020] In the above-mentioned application scheme, the second clearance hole can also prevent corner protrusions, wrinkles, etc. from occurring at the corner positions after the insulating film is wrapped, which facilitates the film coating operation and improves the external appearance after film coating.

[0021] In some embodiments, a third reserved portion is provided between the large coverage area and the small coverage area of ​​the shell, and a third crease is provided on both sides of the third reserved portion; the width of the third reserved portion matches the chamfer of the edge of the shell.

[0022] In the above-mentioned application scheme, the third reserved part can be used to cover the chamfered edges of the shell, which facilitates the improvement of the film application quality of the insulating film at the chamfered edges of the shell.

[0023] In some embodiments, the shell small covering areas disposed on the same side of the shell overlap.

[0024] In the above-mentioned application scheme, the reliability of the coating can be improved by forming an overlap between the small coating areas of the shell.

[0025] In some embodiments, a fourth reserved portion is provided between the large coverage area of ​​the shell and the bottom coverage area of ​​the shell, and a fourth crease is provided on both sides of the fourth reserved portion; the width of the fourth reserved portion matches the chamfer of the edge of the shell.

[0026] In the above-mentioned application scheme, the fourth reserved part can be used to cover the chamfered edges of the shell, which facilitates the improvement of the film application quality of the insulating film at the chamfered edges of the shell.

[0027] In some embodiments, the bottom covering areas of the housing disposed on the bottom surface of the housing overlap.

[0028] In the above-mentioned application scheme, the reliability of the coating can be improved by forming an overlap between the bottom covering areas of the shell.

[0029] In some embodiments, the length of the small cover area of ​​the shell is the same as the height of the shell, and the length of the bottom cover area of ​​the shell is less than the length of the shell; or, the length of the small cover area of ​​the shell is less than the height of the shell, and the length of the bottom cover area of ​​the shell is the same as the length of the shell.

[0030] In the above-mentioned application scheme, by designing the length of the small covering area and the bottom covering area of ​​the shell, it is convenient to cover the chamfered edge of the bottom of the shell.

[0031] On the other hand, this application provides a battery in which the above-mentioned battery cells are disposed.

[0032] In yet another aspect, the application provides a battery, which comprises the above battery.

[0033] Other features and advantages of the application will be set forth in the following description, and in part will be apparent from the description, or can be learned by practice of the application as hereinafter described, or can be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0034] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description, with reference to the drawings in which:

[0035] Figure 1 Structure schematic diagram of the insulation film of some embodiments of the application in unwound state.

[0036] Figure 2 Structure schematic diagram of the insulation film of some embodiments of the application in unwound state.

[0037] Figure 3 Structure schematic diagram of the insulation film of some embodiments of the application in unwound state.

[0038] Figure 4 Structure schematic diagram of the insulation film of some embodiments of the application in unwound state.

[0039] Figure 5 Structure schematic diagram of the insulation film of some embodiments of the application in unwound state.

[0040] Figure 6 Structure schematic diagram of the insulation film of some embodiments of the application in unwound state.

[0041] Figure 7 Structure schematic diagram of the insulation film of some embodiments of the application in unwound state.

[0042] Figure 8 Structure schematic diagram of the insulation film of some embodiments of the application in unwound state.

[0043] Some of the drawings in the detailed description are as follows:

[0044] 1000 - electrical equipment; 100 - battery; 10 - battery monomer; 20 - box, 21 - upper box, 22 - lower box; 1 - shell; 2 - end cover, 21 - electrode terminal, 22 - pressure relief mechanism, 23 - identification part; 3 - insulation film, 31 - end cover covering area, 311 - first via hole, 312 - second via hole, 313 - third via hole, 314 - first reserved part, 3141 - first crease, 315 - second reserved part, 3151 - second crease, 32 - shell large surface covering area, 321 - third reserved part, 3211 - third crease, 322 - fourth reserved part, 3221 - fourth crease, 33 - shell small surface covering area, 34 - shell bottom surface covering area, 35 - first notch part, 36 - second notch part, 37 - first avoiding hole, 38 - second avoiding hole. DETAILED DESCRIPTION

[0045] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0047] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0048] Reference herein to "embodiments" means that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0049] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0050] In the description of the embodiments of the present application, unless specifically defined and limited otherwise, the terms "mount", "connect", "connect", "fix", and other terms should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0051] In the related art, during the assembly of the battery, two adjacent battery monomers are usually arranged in close proximity, but since the shell of each battery monomer usually has a potential corresponding to the negative electrode of the battery monomer, if the shell of the battery monomer is poorly insulated and short-circuits with the shell of the adjacent other battery monomer, not only the overall output voltage of the battery will be reduced, but also there will be a safety hazard.

[0052] In order to insulate the outer surface of the battery monomer, an insulating film is usually used to coat the shell. However, the present application finds that after the insulating film is coated on the shell, an overlap is formed at the upper and lower ends of the two opposite small sides of the shell, and the number of layers of the overlap and the area of the overlap are relatively large, thereby causing the outer dimension of the battery monomer to increase significantly, and thus reducing the energy density of the battery assembly.

[0053] In order to solve the above technical problems, the present embodiment provides a battery monomer, a battery and an electric device, which can optimize the film coating method of the battery monomer, reduce the occupied space of the battery monomer after film coating, so as to improve the battery capacity.

[0054] In the present embodiment, the battery monomer can include a lithium ion secondary battery, a lithium ion primary battery, a lithium-sulfur battery, a sodium lithium ion battery, a sodium ion battery or a magnesium ion battery, etc. The present embodiment is not limited thereto. The battery monomer can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc. The present embodiment is also not limited thereto. The battery monomer can be a cylindrical battery monomer or a square battery monomer.

[0055] The battery mentioned in the present embodiment refers to a physical module including one or more battery monomers to provide higher voltage and capacity. For example, the battery mentioned in the present application can include a battery module or a battery pack, etc. The battery generally includes a box for packaging one or more battery monomers, which can avoid the influence of liquid or other foreign matters on the charging or discharging of the battery monomer.

[0056] It can be understood that the power consuming device to which the battery cell, the battery module or the battery described in the embodiments of the present application can be in various forms, for example, a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric automobile, a ship, a spacecraft, an electric toy and an electric tool, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, for example, a game machine, an electric automobile toy, an electric ship toy and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator and an electric planer.

[0057] The battery cell, the battery module or the battery described in the embodiments of the present application is not only limited to the power consuming device described above, but can also be applied to all power consuming devices using the battery cell, the battery module and the battery. For the sake of simplicity, the following embodiments are described by taking an electric automobile as an example.

[0058] As shown in Figures 1 to 8 According to some embodiments of the present application, a battery cell 10 is provided, which includes a shell 1 having an opening, an end cover 2 covering the opening, and an insulating film 3 including an integrally formed end cover covering area 31, a shell large surface covering area 32, shell small surface covering areas 33 arranged at both ends of the shell large surface covering area 32, and a shell bottom surface covering area 34. A first gap part 35 is formed between the edge of the shell small surface covering area 33 and the edge of the end cover covering area 31, and a second gap part 36 is formed between the edge of the shell small surface covering area 33 and the edge of the shell bottom surface covering area 34.

[0059] In some embodiments, the shell 1 is in the form of a cuboid, and the shell 1 is provided with the opening on one side surface thereof. In the present embodiment, in order to distinguish the side surfaces of the shell 1, the side surface on which the opening is arranged is taken as the top surface of the shell 1, and the side surface opposite to the opening is taken as the bottom surface. It should be understood that the top surface and the bottom surface are mainly used to distinguish the side surfaces of the shell 1, and are not intended to limit the arrangement of the shell 1 and the battery cell.

[0060] In some embodiments, as shown in Figure 2 The end cover 2 is arranged on the opening to serve as the top surface of the shell 1, the end cover covering area 31 is arranged on the end cover 2, and the shell bottom surface covering area 34 is arranged on the side surface opposite to the end cover 2.

[0061] In addition, the shell 1 has two large surfaces and two small surfaces on the outer periphery, the two large surfaces are arranged opposite to each other, and the two small surfaces are arranged opposite to each other. The shell large surface covering area 32 is arranged on the large surface of the shell 1, and the shell small surface covering area 33 is arranged on the small surface of the shell 1, as shown inFigure 3 As shown.

[0062] At this point, the insulating film 3 can be applied to all the outer surfaces of the housing 1.

[0063] In some embodiments, the first notch 35 and the second notch 36 are formed by cutting the insulating film 3.

[0064] By setting the first notch 35 and the second notch 36, it is easy to reduce the number of overlapping layers and the stacked area between the end cap covering area 31, the small covering area 33 of the shell, and the bottom covering area 34 of the shell. Compared with the traditional wrapping method, it can reduce the space waste caused by the large number of overlapping layers and the large stacked area of ​​the insulating film 3 on the outside of the shell, and facilitate the improvement of the volume utilization rate of the battery cell 10.

[0065] As one application example, see reference Figure 2 , Figure 3 As shown, an electrode terminal 21 is provided on the end cap 2, and a first through hole 311 for exposing the electrode terminal 21 is provided on the end cap covering area 31.

[0066] In some embodiments, two electrode terminals 21 are provided and are located at both ends of the end cap 2 respectively. Therefore, two first through holes 311 are also provided, and their shapes are adapted to the shapes of the electrode terminals 21.

[0067] By using the first through-hole 311, the electrode terminal 21 can be exposed after the insulating film 3 is covered on the housing 1, thus facilitating subsequent electrical connection.

[0068] As one application example, see reference Figure 2 , Figure 3 As shown, a pressure relief mechanism 22 is provided on the end cap 2, and a second through hole 312 for exposing the pressure relief mechanism 22 is provided on the end cap covering area 31.

[0069] In some embodiments, the shape of the second through hole 312 is adapted to the shape of the pressure relief mechanism 22.

[0070] In some embodiments, the pressure relief mechanism 22 is configured as an explosion-proof valve.

[0071] By using the second through hole 312, the pressure relief mechanism 22 can be exposed after the insulating film 3 is covered on the housing 1, thus facilitating the normal use of the pressure relief mechanism 22 in the future.

[0072] As one application example, please refer to [link / reference]. Figure 2 , Figure 3As shown, an identification part 23 is provided on the end cap 2, and a third through hole 313 for exposing the identification part 23 is provided on the end cap covering area 31.

[0073] In some embodiments, the identification part 23 may be configured as a QR code, barcode, or the like.

[0074] In some embodiments, the shape of the third via 313 is adapted to the shape of the marking portion 23.

[0075] By using the third through-hole 313, the marking part 23 can be exposed after the insulating film 3 is covered on the housing 1, which facilitates subsequent information reading and identification.

[0076] As one example of its application, such as Figure 1 As shown, the end cap covering area 31 has a first reserved portion 314 at both ends, and a first crease 3141 is provided between the first reserved portion 314 and the body of the end cap covering area 31; the width of the first reserved portion 314 matches the chamfer of the edge of the shell 1.

[0077] Here, a cubic battery is used as an example. At the intersection of the top surface of the cubic battery and its two large surfaces, the intersection of the top surface of the cubic battery and its two small surfaces, the intersection of the large surface and the small surface of the cubic battery, the intersection of the bottom surface of the cubic battery and its two large surfaces, and the intersection of the bottom surface of the cubic battery and its two small surfaces, chamfers may be provided to reduce the sharpness of the edges.

[0078] In some embodiments, the position of the first crease 3141 corresponds to the edge of the chamfer, and the width of the first reserved portion 314 corresponds to the width of the chamfer of the housing 1, so that the first reserved portion 314 can be pasted and cover the chamfer of the housing 1. Here, the chamfer refers to the chamfer formed at the two short sides of the top surface of the housing 1.

[0079] The first reserved portion 314 can be used to cover the chamfered edges of the housing 1, effectively reducing the amount of material used for lateral covering in the end cap covering area 31, avoiding lateral overlap, or reducing the stacked area after overlap.

[0080] As one application example, please refer to [link / reference]. Figure 1 As shown, the end cap covering area 31 is provided with a large shell covering area 32, a small shell covering area 33, and a bottom shell covering area 34 on both sides; a first clearance hole 37 is provided at the corner intersection formed between the first reserved part 314, the large shell covering area 32, and the small shell covering area 33.

[0081] In some embodiments, four first clearance holes 37 are provided, and they are respectively located at the four corner positions of the end cap covering area 31, such as... Figure 1 As shown.

[0082] By setting the first clearance hole 37, corner protrusions and wrinkles can be avoided at the corner positions formed after the insulating film 3 is covered, which facilitates the film covering operation and improves the external appearance after film covering.

[0083] As one application example, see reference Figure 1 As shown, a second reserved portion 315 is provided between the end cap covering area 31 and the large covering area 32 of the shell, and a second crease 3151 is provided on both sides of the second reserved portion 315; the width of the second reserved portion 315 matches the chamfer of the edge of the shell 1.

[0084] In some embodiments, the second reserved portion 315 corresponds to the chamfer formed on the two long sides of the top surface of the housing 1, and the width of the second reserved portion 315 matches the chamfer of the housing 1.

[0085] The second reserved part 315 can be used to cover the chamfered edges of the housing 1, which facilitates the improvement of the film quality of the insulating film 3 at the chamfered edges of the housing 1.

[0086] As one application example, see reference Figure 1 As shown, a second clearance hole 38 is provided at the corner intersection formed between the small shell covering area 33, the large shell covering area 32, and the bottom shell covering area 34.

[0087] In some embodiments, the number of second clearance holes 38 is four, two of which are located at the corners of one housing large covering area 32, and the other two are located at the corners of another housing large covering area 32, such as... Figure 1 As shown.

[0088] The second clearance hole 38 can also prevent corner protrusions and wrinkles from appearing at the corners of the insulating film 3 after it is wrapped, making the coating operation easier and improving the external appearance after coating.

[0089] As one application example, please refer to [link / reference]. Figure 1 As shown, a third reserved portion 321 is provided between the large covering area 32 and the small covering area 33 of the shell, and a third crease 3211 is provided on both sides of the third reserved portion 321; the width of the third reserved portion 321 matches the chamfer of the edge of the shell 1.

[0090] In some embodiments, the third reserved portion 321 corresponds to the chamfered edges formed on the two short sides of the large surface of the housing 1, and the width of the third reserved portion 321 matches the chamfered edges of the housing 1. The small surface covering area 33 of the housing 1 is then covered by the third reserved portion 321 after it is attached, and each small surface of the housing 1 has a small surface covering area 33 on both sides, such as... Figure 3 As shown.

[0091] The third reserved part 321 can be used to cover the chamfered edges of the housing 1, which facilitates the improvement of the film quality of the insulating film 3 at the chamfered edges of the housing 1.

[0092] As one example of its application, such as Figure 4 , Figure 6 As shown, the shell small covering areas 33 disposed on the same side of the shell 1 overlap.

[0093] In some embodiments, the small cover areas 33 on both sides of the small face of the housing 1 overlap after covering, and the thickness of the overlap is not less than 1 mm.

[0094] In some embodiments, such as Figure 5 As shown, in applications, there is a need to create a window on the small surface of the housing 1. This window refers to ensuring that the insulating film 3, after being wrapped, does not obstruct the central area of ​​the small surface of the housing 1. To meet this requirement, the width of the small surface covering areas 33 on both sides of the housing is matched to the width of the chamfered edges of the housing 1, thus covering the chamfered edges. To prevent the small surface covering areas 33 from lifting or detaching after wrapping, the width of the small surface covering areas 33 is set to be greater than the width of the chamfered edges of the housing 1, so that the small surface covering areas 33 still have sufficient allowance to adhere to the small surface of the housing 1.

[0095] By forming an overlap between the small covering areas 33 of the shell, the reliability of the coating can be improved.

[0096] As one application example, a fourth reserved portion 322 is provided between the large cover area 32 of the shell and the bottom cover area 34 of the shell, and a fourth crease 3221 is provided on both sides of the fourth reserved portion 322; the width of the fourth reserved portion 322 matches the chamfer of the edge of the shell 1.

[0097] In some embodiments, the fourth reserved portion 322 corresponds to the chamfer formed at the bottom long side of the large surface of the housing 1, and the width of the fourth reserved portion 322 matches the chamfer of the housing 1. The housing bottom covering area 34 covers the bottom surface of the housing 1 after the fourth reserved portion 322 is attached, and both sides of the bottom surface of the housing 1 have the housing bottom covering area 34.

[0098] The fourth reserved part 322 can be used to cover the chamfered edges of the housing 1, which facilitates the improvement of the film quality of the insulating film 3 at the chamfered edges of the housing 1.

[0099] As one example of its application, such as Figure 4 , Figure 5 As shown, the bottom covering areas 34 of the housing 1 overlap.

[0100] In some embodiments, the bottom covering areas 34 of the housing 1 located on both sides of the bottom surface overlap after covering, and the thickness of the overlap is not less than 1 mm.

[0101] In some embodiments, such as Figure 6 As shown, in applications, there is also a need to open windows on the bottom surface of the housing 1, that is, the insulating film 3 should not obstruct the central area of ​​the bottom surface of the housing 1 after being covered. Under this requirement, the width of the bottom covering area 34 on both sides of the housing is adapted to the width of the chamfer of the edge of the housing 1 to cover the chamfer of the edge of the housing 1; in order to prevent the bottom covering area 34 of the housing from lifting or falling off after being covered, the width of the bottom covering area 34 of the housing is set to be greater than the width of the chamfer of the edge of the housing 1, so that the bottom covering area 34 of the housing still has a margin to stick to the bottom surface of the housing 1.

[0102] By forming an overlap between the bottom covering areas 34 of the shell, the reliability of the coating can be improved.

[0103] As one application example, the length of the small enclosure 33 of the shell is the same as the height of the shell 1, and the length of the bottom enclosure 34 of the shell is less than the length of the shell 1; or, the length of the small enclosure 33 of the shell is less than the height of the shell 1, and the length of the bottom enclosure 34 of the shell is the same as the length of the shell 1.

[0104] In some embodiments, the length of the small covering area 33 of the housing is set to be the same as the height of the housing 1, while the length of the bottom covering area 34 of the housing is set to be less than the length of the housing 1; thereby, after the insulating film 3 is covered, the bottom of the small covering area 33 of the housing can have a margin for covering the chamfered edges of the short side of the bottom surface of the housing 1.

[0105] In some embodiments, the length of the small covering area 33 of the housing is set to be less than the height of the housing 1, while the length of the bottom covering area 34 of the housing is set to be the same as the length of the housing 1; thereby, after the insulating film 3 is applied, the end of the bottom covering area 34 of the housing can have a margin for covering the chamfered edge of the short side of the bottom surface of the housing 1.

[0106] By designing the lengths of the small covering area 33 and the bottom covering area 34 of the shell, it is convenient to cover the chamfered edges of the bottom of the shell 1.

[0107] On the other hand, reference Figure 7 As shown, this embodiment provides a battery 100, which contains the battery cell 10 as described above.

[0108] In some embodiments, the battery 100 includes a housing 20, which includes a lower housing 22 for carrying a battery cell 10 and an upper housing 21 for covering the lower housing 22; wherein one or more battery cells 10 are disposed between the lower housing 22 and the upper housing 21.

[0109] By applying the battery cell 10 provided in this embodiment within the battery 100, the space occupied by the insulating film 3 after the battery cell 10 is covered with the insulating film can be effectively reduced. Therefore, under the same layout of the battery internal space, a larger battery capacity can be arranged, thereby facilitating the improvement of the utilization rate of the battery internal space and increasing the battery capacity.

[0110] On the other hand, refer to Figure 8 As shown, this embodiment also provides an electrical device 1000, which is equipped with the battery 100 as described above.

[0111] By applying the battery 100 provided in this embodiment within the electrical device 1000, the beneficial effects brought about by the battery cell 10 can be directly or indirectly reflected in the electrical device 1000. For example, it can facilitate the improvement of the battery life of the electrical device 1000.

[0112] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell, characterized in that, include: The shell has an opening; End cap, used to cover the opening; An insulating film includes an integrally formed end cap covering area, a large housing covering area, a small housing covering area and a bottom housing covering area disposed at both ends of the large housing covering area, wherein a first notch is formed between the edge of the small housing covering area and the edge of the end cap covering area, and a second notch is formed between the edge of the small housing covering area and the edge of the bottom housing covering area.

2. The battery cell according to claim 1, characterized in that, The end cap is provided with electrode terminals, and the end cap covering area is provided with a first through hole for exposing the electrode terminals.

3. The battery cell according to claim 1, characterized in that, The end cap is provided with a pressure relief mechanism, and the end cap covering area is provided with a second through hole for exposing the pressure relief mechanism.

4. The battery cell according to claim 1, characterized in that, The end cap is provided with an identification part, and the end cap covering area is provided with a third through hole for exposing the identification part.

5. The battery cell according to any one of claims 1-4, characterized in that, The end cap covering area is provided with a first reserved portion at both ends, and a first crease is provided between the first reserved portion and the body of the end cap covering area; The width of the first reserved portion matches the chamfer of the edge of the housing.

6. The battery cell according to claim 5, characterized in that, Both sides of the end cap covering area are provided with the large shell covering area, the small shell covering area, and the bottom shell covering area; A first clearance hole is provided at the corner intersection formed between the first reserved part, the large cover area of ​​the shell, and the small cover area of ​​the shell.

7. The battery cell according to claim 6, characterized in that, A second reserved portion is provided between the end cap covering area and the large covering area of ​​the shell, and second creases are provided on both sides of the second reserved portion; The width of the second reserved portion matches the chamfer of the edge of the housing.

8. The battery cell according to claim 6 or 7, characterized in that, A second clearance hole is provided at the corner intersection formed by the small cover area, the large cover area, and the bottom cover area of ​​the shell.

9. The battery cell according to claim 8, characterized in that, A third reserved portion is provided between the large coverage area of ​​the shell and the small coverage area of ​​the shell, and third creases are provided on both sides of the third reserved portion; The width of the third reserved portion matches the chamfer of the edge of the housing.

10. The battery cell according to claim 9, characterized in that, The small covering areas of the housing located on the same side of the housing overlap.

11. The battery cell according to claim 8, characterized in that, A fourth reserved portion is provided between the large coverage area of ​​the shell and the bottom coverage area of ​​the shell, and a fourth crease is provided on both sides of the fourth reserved portion; The width of the fourth reserved portion matches the chamfer of the edge of the shell.

12. The battery cell according to claim 11, characterized in that, The bottom covering areas of the housing are arranged on the bottom surface of the housing and overlap.

13. The battery cell according to any one of claims 9-12, characterized in that, The length of the small covering area of ​​the shell is the same as the height of the shell, and the length of the bottom covering area of ​​the shell is less than the length of the shell; Alternatively, the length of the small covering area of ​​the shell is less than the height of the shell, and the length of the bottom covering area of ​​the shell is the same as the length of the shell.

14. A battery, characterized in that, The battery contains a battery cell as described in any one of claims 1-13.

15. An electrical appliance, characterized in that, The electrical equipment is equipped with a battery as described in claim 14.

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