Battery shell and battery

Abstract

The utility model discloses a battery shell and a battery, and belongs to the technical field of batteries. The battery shell comprises a first side plate, a second side plate and a bottom plate, the at least two first side plates and the at least two second side plates are alternately connected to form a hollow shell structure with two open ends, and the bottom plate is connected with and covers the opening at one end of the hollow shell structure; a first concave area is formed in the side, close to the first side plate, of the bottom plate and used for containing the first overlapping section of the blue film. According to the battery shell, the first concave area is arranged on the bottom plate and can be used for accommodating the first overlapping section of the blue film, so that the thickness of the first overlapping section protruding out of the surface of the bottom plate is reduced or even eliminated, the flatness of the bottom plate is ensured, the probability that the first overlapping section warps due to scratching is reduced, and the service life of the battery shell is prolonged. The insulation reliability of the whole battery in use is improved; and the first overlapping section is accommodated in the first sunken region, so that the blue film can be prevented from occupying extra space in the thickness direction, and the energy density of the battery is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a battery casing and battery. BACKGROUND

[0002] The processing steps of the square aluminum shell lithium ion battery are as follows: 1) aluminum plate is formed into an aluminum shell of cuboid structure through multi-stage stretching; 2) the battery monomer is formed by placing the battery cell in the aluminum shell; 3) the battery monomer is coated with insulating blue film on the outside.

[0003] When the battery monomer is coated with insulating blue film on the outside, the prior art adopts a meandering coating method, which coats the side of the shell first and forms a tail end at the bottom of the shell. However, the blue film will form an overlapping section when the tail end is formed, which increases the thickness of the local part, and the overlapping section and other areas coated with the blue film will have a thickness difference, which not only affects the stability of the battery placement, but also easily cracks when the overlapping section is scratched, affecting the overall coating of the shell. In addition, the structure of the overlapping section protruding relative to other parts also occupies a certain space, reducing the overall energy density of the battery monomer.

[0004] Therefore, there is an urgent need for a battery shell to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve or at least alleviate part or all of the above problems. Therefore, the utility model aims to provide a battery shell and battery, which can effectively reduce the probability of warping and cracking of the overlapping section due to scratching, and improve the insulation reliability of the battery during use.

[0006] In order to achieve the above target, the utility model adopts the following technical scheme:

[0007] A battery shell comprises a first side plate, a second side plate and a bottom plate.

[0008] At least two first side plates and at least two second side plates are alternately connected to form a hollow structure with open ends, and the bottom plate is connected and covered at one end opening of the hollow structure.

[0009] The side of the bottom plate close to the first side plate forms a first recessed area, and the first recessed area is used to accommodate the first overlapping section of the blue film.

[0010] As a preferred scheme of the battery shell provided by the utility model, the bottom plate comprises a first plate, a second plate and a connecting plate, both ends of the first plate are connected to one of the second plates through the connecting plate, one end of the second plate away from the first plate is connected to the corresponding first side plate, and the thickness of the first plate is greater than that of the second plate, so as to form the first recessed area on the outside of the second plate.

[0011] As a preferred scheme of the battery shell provided by the utility model, the thickness of the connecting plate gradually decreases towards the direction close to the second plate, the thickness of the connecting plate close to the first plate is same with the thickness of the first plate, and the thickness of the connecting plate close to the second plate is same with the thickness of the second plate.

[0012] As a preferred scheme of the battery shell provided by the utility model, the bottom plate comprises a first plate and two second plates, two ends of the first plate are connected with the two second plates respectively, and one end of the two second plates away from the first plate is connected with the first side plate of the corresponding side respectively.

[0013] As a preferred scheme of the battery shell provided by the utility model, the thickness H1 of the first plate is 1.0mm-1.2mm, and / or the thickness H2 of one end of the second plate close to the first side plate is 0.7mm-0.9mm.

[0014] As a preferred scheme of the battery shell provided by the utility model, the width of the first side plate is less than the width of the second side plate.

[0015] As a preferred scheme of the battery shell provided by the utility model, the thickness H3 of the first side plate is 0.6mm-0.8mm, and / or the thickness H4 of the second side plate is 0.5mm-0.6mm.

[0016] As a preferred scheme of the battery shell provided by the utility model, at least one first side plate is formed with a second recessed area, and the second recessed area is used for accommodating a second overlapping section of the blue film.

[0017] As a preferred scheme of the battery shell provided by the utility model, the part of the first side plate, on which the second recessed area is arranged, and the part of the first side plate, on which the second recessed area is not arranged, are connected through a transition part.

[0018] The utility model also provides a battery which comprises an electric core, a blue film and the above-mentioned battery shell, the electric core is accommodated in the battery shell, the blue film is wrapped outside the battery shell, and a first overlapping section of the blue film is located in a first recessed area of the battery shell.

[0019] The utility model has the advantages of:

[0020] The battery shell provided by the utility model realizes the accommodation and protection of the battery core, avoids the damage of the battery core caused by external expansion, extrusion or vibration, the first overlapping section of the blue film is accommodated in the first recessed area, the thickness of the first overlapping section protruding from the surface of the bottom plate is reduced or even eliminated, the flatness of the bottom plate is ensured, the probability of the first overlapping section being warped due to scratching is reduced, and the insulation reliability of the whole battery during use is improved, in addition, the blue film occupies no extra space in the thickness direction, and the energy density of the battery is effectively improved.

[0021] The battery provided by the embodiment can effectively reduce the probability of the first overlapping section of the blue film being warped and cracked due to scratching, improve the insulation reliability of the battery during use, and effectively improve the energy density of the battery. DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the drawings needed in the description of the embodiments of the utility model will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the contents of the embodiments of the utility model and the drawings.

[0023] Figure 1 It is a structural schematic view of the battery provided by the utility model;

[0024] Figure 2 It is a sectional view of the battery shell provided by the first embodiment of the utility model;

[0025] Figure 3 It is a structural schematic view of the bottom plate provided by the first embodiment of the utility model;

[0026] Figure 4 It is a sectional view of the battery shell provided by the second embodiment of the utility model;

[0027] Figure 5 It is a structural schematic view of the bottom plate provided by the second embodiment of the utility model;

[0028] Figure 6 It is a sectional view of the battery shell provided by the third embodiment of the utility model.

[0029] DRAWINGS

[0030] 100, battery shell; 200, top cover; 300, blue film; 3001, second overlapping section;

[0031] 10, first side plate; 101, second recessed area; 11, first part; 12, second part; 13, transition part;

[0032] 20, second side plate;

[0033] 30, bottom plate; 301, first recessed area; 31, first plate; 32, second plate; 33, connecting plate. DETAILED DESCRIPTION

[0034] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described accompanying drawings.

[0035] In the present application, the terms "comprising", "containing", "having" or any other similar words are intended to encompass a non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or other elements inherent to such a process, method, article or device. Without more limitations, the element defined by the phrase "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0036] In the present application, the term "and / or" is a description of the association relationship between the associated objects, which means that there can be three kinds of relationships. For example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents a "and / or" relationship between the front and rear associated objects.

[0037] In the present application, the terms "connection", "combination", "coupling", "mounting" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. Among them, the direct connection means that two parts or components are connected together without setting intermediate parts, and the indirect connection means that two parts or components are connected with at least one intermediate part, and the two parts or components are connected through the intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0038] In the present application, those of ordinary skill in the art will understand that relative terms used in connection with a quantity or a condition (for example, "about", "approximately", "substantially" and the like) include the stated value and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with a measurement of a particular value, the tolerance caused by manufacturing, assembly, use, and the like associated with a particular value. Such terms should also be considered to disclose a range defined by the absolute values of the two endpoints. The relative terms can refer to a certain percentage (for example, 1%, 5%, 10% or more) of the indicated value plus or minus. The numerical value without the relative term should also be disclosed as a particular value with a tolerance. In addition, "substantially" when expressing the relative angular positional relationship (for example, substantially parallel, substantially perpendicular), can refer to a certain number of degrees (for example, 1 degree, 5 degrees, 10 degrees or more) plus or minus the indicated angle.

[0039] In the present application, those of ordinary skill in the art will understand that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or multiple parts in combination.

[0040] In the present application, the terms "up", "down", "left", "right", "front", "back" and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as limiting the embodiments of the present application. In addition, it should also be understood in the context that when referring to one element connected to another element "up" or "down", it can not only be directly connected to another element "up" or "down", but also indirectly connected to another element "up" or "down" through an intermediate element. It should also be understood that the terms "up", "down", "left", "right", "front", "back" and the like not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the lower side, the lower left side, the lower right side, the lower front side and the lower back side, etc.

[0041] Figure 1 The structure of the battery provided by the present application is shown. As Figure 1As shown, the utility model provides a kind of battery, the battery includes battery shell 100, top cover 200 and electric core (not shown in drawing), the side of battery shell 100 has opening, electric core is housed in battery shell 100, top cover 200 is blocked in the opening of battery shell 100, to guarantee the sealing property of battery.In the embodiment, battery is square shell battery.Battery shell 100 is roughly the cavity structure of one end opening rectangular parallelepiped, electric core can be placed into the inner cavity of battery shell 100 from the opening of battery shell 100.Battery shell 100 and top cover 200 can play the role of housing and protecting electric core, on the one hand, it can resist external expansion, extrusion or vibration, so that electric core is not damaged, on the other hand, it can also ensure the sealing property of battery, to prevent electrolyte leakage, so as to guarantee the use safety of the battery.

[0042] In the embodiment, battery shell 100 is aluminum shell, and the aluminum shell has the advantages of light weight, high safety, good heat dissipation, excellent electrical conductivity, strong corrosion resistance and easy processing.

[0043] Of course, in other embodiments, battery shell 100 can also be made of other metal materials, which is not limited in the embodiment.

[0044] Optionally, the battery further comprises a blue film wrapped outside the battery shell 100. The blue film can serve as insulation, waterproofing, and aesthetics. After wrapping the blue film, an overlapping section is formed on one side of the battery shell 100. The outer side of the battery shell 100 has a recessed area corresponding to the overlapping section, and the overlapping section is housed in the recessed area, preventing the overlapping section from cracking due to thickness differences with other parts.

[0045] In addition, the utility model also provides a kind of battery shell 100, below through multiple embodiments, the specific structure of battery shell 100 provided by the utility model is introduced in detail.

[0046] Embodiment one

[0047] Figure 2 A cross-sectional view of the battery shell 100 according to the embodiment is shown. As Figure 2 and in combination Figure 1 As shown, the utility model provides a kind of battery shell 100, the battery shell 100 includes first side plate 10, second side plate 20 and bottom plate 30;At least two first side plates 10 and at least two second side plates 20 are alternately connected to form a hollow structure with open ends, and the bottom plate 30 is connected and covers one end opening of the hollow structure;First recessed area 301 is formed on the side of bottom plate 30 close to first side plate 10, and first recessed area 301 is used to accommodate blue film 300 (referenceFigure 6 ) of the first overlap section. Wherein, the top cover 200 is arranged at the other end opening of the hollow shell structure to ensure the sealing of the whole battery.

[0048] It should be explained that the first overlap section will be formed on the bottom surface of the battery shell 100 after the blue film 300 is wrapped outside the battery shell 100. The battery shell 100 provided in the embodiment is surrounded by the first side plate 10, the second side plate 20 and the bottom plate 30 to form a containing space for containing the battery cell, so as to realize the containing and protection of the battery cell, and avoid the damage of the battery cell caused by external expansion, extrusion or vibration; by arranging the first recessed area 301 on the bottom plate 30, the first overlap section of the blue film 300 can be accommodated, so as to reduce or even eliminate the thickness of the first overlap section protruding from the surface of the bottom plate 30, thereby ensuring the flatness of the bottom plate 30, reducing the probability of the first overlap section being warped due to scratching, and further improving the insulation reliability of the whole battery during use; in addition, by accommodating the first overlap section in the first recessed area 301, the blue film 300 can also avoid occupying additional space in the thickness direction, thereby effectively improving the energy density of the battery.

[0049] Figure 3 The structural schematic diagram of the bottom plate 30 provided in the embodiment is shown. As shown in Figure 3 and Figure 2 shown, in the embodiment, the bottom plate 30 includes a first plate 31, a second plate 32 and a connecting plate 33, both ends of the first plate 31 are connected to one second plate 32 through the connecting plate 33 respectively, one end of the second plate 32 away from the first plate 31 is connected to the corresponding first side plate 10, and the thickness of the first plate 31 is greater than the thickness of the second plate 32, so as to form the above-mentioned first recessed area 301 on the outside of the second plate 32. By setting the thickness of the first plate 31 to be greater than the thickness of the second plate 32, the middle region of the bottom plate 30 is made to protrude from other regions of the bottom plate 30 by thinning the thickness, so as to form the above-mentioned first recessed area 301 at the position of the bottom plate 30 close to the first side plate 10, which is simple in structure and convenient for processing and forming.

[0050] Optionally, the thickness of the connecting plate 33 gradually decreases towards the second plate 32, the thickness of the connecting plate 33 close to the first plate 31 is the same as the thickness of the first plate 31, and the thickness of the connecting plate 33 close to the second plate 32 is the same as the thickness of the second plate 32. That is, the connecting plate 33 plays a role of transition between the first plate 31 and the second plate 32, so as to avoid the fracture of the bottom plate 30 caused by the sudden change of thickness, thereby ensuring the structural strength of the battery shell 100.

[0051] As Figure 2 and Figure 3As shown, the thickness H1 of the first plate 31 is 1.0mm-1.2mm; the thickness H2 of the second plate 32 is 0.7mm-0.9mm. Through simulation and experimental verification, the above thickness range can ensure that the partial thickness thinning of the bottom plate 30 forms the first recessed area 301, while not affecting the overall support strength of the battery shell 100. Exemplarily, H1 can be 1.02mm, 1.04mm, 1.05mm, 1.06mm, 1.08mm, 1.10mm, 1.12mm, 1.14mm, 1.15mm, 1.16mm, 1.18mm, etc. H2 can be 0.72mm, 0.74mm, 0.75mm, 0.76mm, 0.78mm, 0.8mm, 0.82mm, 0.84mm, 0.85mm, 0.86mm, 0.88mm, etc. Of course, in other embodiments, the specific values of H1 and H2 are not limited to the above range, and the designer can adjust the specific values of H1 and H2 according to the actual processing needs.

[0052] In the present embodiment, the width of the first side plate 10 is smaller than the width of the second side plate 20. That is, the first recessed area 301 is formed at one end of the bottom plate 30 close to the side plate with smaller area on the battery shell 100, which can make the area of the first recessed area 301 as small as possible, thereby reducing the influence of the thickness thinning of the battery shell 100 on its support performance.

[0053] Optionally, the thickness H3 of the first side plate 10 is 0.6mm-0.8mm; the thickness H4 of the second side plate 20 is 0.5mm-0.6mm. Due to the influence of the stretching process, the thickness of the side with smaller area on the battery shell 100 is greater than the thickness of the side with larger area. The first side plate 10 and the second side plate 20 with the above thickness range can ensure the structural strength of the entire battery shell 100. Exemplarily, H3 can be 0.62mm, 0.64mm, 0.65mm, 0.66mm, 0.68mm, 0.7mm, 0.72mm, 0.74mm, 0.75mm, 0.76mm, 0.78mm, etc. H4 can be 0.52mm, 0.54mm, 0.55mm, 0.56mm, 0.58mm, 0.6mm, 0.62mm, 0.64mm, 0.65mm, 0.66mm, 0.68mm, etc. Of course, in other embodiments, the specific values of H3 and H4 are not limited to the above range, and the designer can adjust the specific values of H3 and H4 according to the actual processing needs.

[0054] Continuing as Figures 1-3 shown, the blue film 300 (refer to Figure 6) including a first side film, a second side film, a first bending film and a second bending film, the blue film 300 is annularly wrapped outside the battery shell 100, and the first side film is pasted on the first side plate 10, the second side film is pasted on the second side plate 20, the first bending film is connected to one end of the first side film close to the bottom plate 30 and is bent and pasted at the bottom plate 30, and the second bending film is connected to one end of the second side film close to the bottom plate 30 and is bent and pasted at the bottom plate 30. After the first bending film and the second bending film are pasted, a first overlapping section is formed on the bottom plate 30, and is accommodated in the first recessed area 301.

[0055] Optionally, the blue film 300 further includes a third bending film and a fourth bending film, the third bending film is connected to one end of the first side film close to the top cover 200 and is bent and pasted at the top cover 200, and the fourth bending film is connected to one end of the second side film close to the top cover 200 and is bent and pasted at the top cover 200.

[0056] Further, the battery further includes an insulating sheet (not shown in the figure), the insulating sheet is arranged on the top cover 200, and the third bending film and the fourth bending film are located between the top cover 200 and the insulating sheet, so as to realize the insulation protection of the top of the battery.

[0057] Embodiment two

[0058] The embodiment provides a battery shell 100, and the specific structure of the battery shell 100 is substantially the same as that of the battery shell 100 in the embodiment one, and the difference lies in that the structure of the bottom plate 30 is different.

[0059] Figure 4 A sectional view of the battery shell 100 provided by the embodiment is shown. Figure 5 A structural schematic view of the bottom plate 30 provided by the embodiment is shown. Figures 4-5 As shown in the figure, in the embodiment, the bottom plate 30 includes a first plate 31 and two second plates 32, two ends of the first plate 31 are connected to the two second plates 32 respectively, one end of each of the two second plates 32 away from the first plate 31 is connected to the corresponding first side plate 10, and the thickness of the second plate 32 gradually decreases in the direction away from the first plate 31. That is, compared with the battery shell 100 in the embodiment one, the battery shell 100 provided by the embodiment omits the arrangement of the connecting plate 33, and the bottom surface of the second plate 32 gradually recesses to the inside of the battery shell 100 from the first plate 31 to the first side plate 10, so as to form the above-mentioned first recessed area 301 on the second plate 32. The design can reduce the thickness thinning rate on the bottom plate 30, so as to ensure that the thickness of the second plate 32 gradually thins, to avoid the case that the bottom plate 30 is broken due to the thickness mutation, so as to ensure the structural strength of the battery shell 100.

[0060] It should be explained that in the embodiment, the H2 is the thickness of the end of the second plate 32 away from the first plate 31, i.e. the thickness of the thinnest position of the second plate 32.

[0061] Embodiment three

[0062] The embodiment provides a battery shell 100, and the specific structure of the battery shell 100 is substantially the same as that of the battery shell 100 in the embodiment one, and the difference lies in that the first side plate 10 is further provided with a second recessed area 101.

[0063] Figure 6 A sectional view of the battery shell 100 provided by the embodiment is shown. Figure 6 As shown in the embodiment, at least one first side plate 10 is formed with a second recessed area 101, and the second recessed area 101 is used for accommodating a second overlapping section 3001 of the blue film 300. It should be explained that when the blue film 300 is wrapped in a meandering manner, the first overlapping section can be formed at the bottom plate 30, and the second overlapping section 3001 can be formed at one of the first side plates 10. That is, in the embodiment, the recessed area is formed on the bottom plate 30 and the first side plate 10, and when the blue film 300 is wrapped in a meandering manner, the operator can accommodate the first overlapping section in the first recessed area 301, and at the same time, the second overlapping section 3001 is accommodated in the second recessed area 101, thereby further improving the flatness of the entire battery outer surface.

[0064] In addition, in the embodiment, the number of the first side plates 10 is two, and the number of the second side plates 20 is two, and the two first side plates 10 and the two second side plates 20 are arranged to form a hollow cuboid shell structure. When the second recessed area 101 is arranged, the second recessed area 101 can be arranged on one of the first side plates 10, or the second recessed area 101 can be arranged on all the first side plates 10, and the above arrangement can achieve the above effect.

[0065] By arranging the second recessed area 101 on the side plate with a smaller area on the battery shell 100, the area of the second recessed area 101 can be as small as possible (i.e. the area of the thickness reduction of the first side plate 10 is small), thereby reducing the influence of the thickness reduction of the battery shell 100 on the supporting performance.

[0066] Specifically, as shown in the embodiment, Figure 6As shown, the first side plate 10 comprises a first part 11, a second part 12 and a transition part 13, two ends of the first part 11 are connected with one second part 12 through the transition part 13 respectively, one end of the second part 12 away from the first part 11 is connected with the second side plate 20 of the corresponding side respectively, the thickness of the first part 11 is less than the thickness of the second part 12, so as to form the second recessed area 101 on the outer side of the first part 11. By setting the thickness of the first part 11 less than the thickness of the second part 12, the middle area of the first side plate 10 is recessed relative to other areas of the first side plate 10 by thinning, so as to form the first recessed area 301 at the middle area of the first side plate 10, which is simple in structure and convenient for processing and forming.

[0067] Optionally, the thickness of the transition part 13 gradually increases towards the second part 12, the thickness of the transition part 13 close to the first part 11 is the same as the thickness of the first part 11, and the thickness of the transition part 13 close to the second part 12 is the same as the thickness of the second part 12. That is, the transition part 13 plays a role in transitioning between the first part 11 and the second part 12, so as to avoid the first side plate 10 from being broken due to sudden change in thickness, thereby ensuring the structural strength of the battery shell 100; meanwhile, the design can also ensure the flatness of the blue film 300.

[0068] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the above examples do not limit the present application in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the protection scope of the present application.

Claims

1. A battery casing, characterized in that, It includes a first side plate (10), a second side plate (20), and a bottom plate (30); At least two first side plates (10) and at least two second side plates (20) are alternately connected to form a hollow shell structure with open ends, and the bottom plate (30) is connected to and covers one end opening of the hollow shell structure; The base plate (30) has a first recessed area (301) formed on the side near the first side plate (10), the first recessed area (301) being used to accommodate the first overlapping segment of the blue film (300).

2. The battery casing according to claim 1, characterized in that, The base plate (30) includes a first plate (31), a second plate (32) and a connecting plate (33). The two ends of the first plate (31) are respectively connected to a second plate (32) through the connecting plate (33). The end of the second plate (32) facing away from the first plate (31) is respectively connected to the first side plate (10) on the corresponding side. The thickness of the first plate (31) is greater than the thickness of the second plate (32) so as to form the first recessed area (301) on the outside of the second plate (32).

3. The battery casing according to claim 2, characterized in that, The thickness of the connecting plate (33) gradually decreases towards the second plate (32). The thickness of the connecting plate (33) near the first plate (31) is the same as the thickness of the first plate (31). The thickness of the connecting plate (33) near the second plate (32) is the same as the thickness of the second plate (32).

4. The battery casing according to claim 1, characterized in that, The base plate (30) includes a first plate (31) and two second plates (32). The two ends of the first plate (31) are respectively connected to the two second plates (32). The ends of the two second plates (32) away from the first plate (31) are respectively connected to the first side plate (10) on the corresponding side. The thickness of the second plate (32) gradually decreases in the direction away from the first plate (31).

5. The battery casing according to any one of claims 2 to 4, characterized in that, The thickness H1 of the first plate (31) is 1.0 mm to 1.2 mm; and / or the thickness H2 of the second plate (32) near the end of the first side plate (10) is 0.7 mm to 0.9 mm.

6. The battery casing according to any one of claims 1 to 4, characterized in that, The width of the first side plate (10) is smaller than the width of the second side plate (20).

7. The battery casing according to claim 6, characterized in that, The thickness H3 of the first side plate (10) is 0.6 mm to 0.8 mm; and / or the thickness H4 of the second side plate (20) is 0.5 mm to 0.6 mm.

8. The battery casing according to any one of claims 1 to 4, characterized in that, At least one of the first side plates (10) has a second recessed area (101) formed thereon for accommodating a second overlapping segment (3001) of the blue film (300).

9. The battery casing according to claim 8, characterized in that, The portion of the first side plate (10) having the second recessed area (101) and the portion of the first side plate (10) not having the second recessed area (101) are connected by a transition portion (13).

10. A battery, characterized in that, The battery includes a battery cell, a blue film (300), and a battery housing as described in any one of claims 1 to 9, wherein the battery cell is housed within the battery housing, the blue film (300) covers the outside of the battery housing, and a first overlapping section of the blue film (300) is located in a first recessed area (301) of the battery housing.

Images