Shell and battery

Abstract

The shell comprises a packaging body, the packaging body comprises a body part and a protruding part, the protruding part is located on one side, in the first direction, of the body part and is perpendicular to the body part, the packaging body defines a containing cavity for containing a battery cell, the packaging body comprises a top wall and a side wall, the side wall surrounds the top wall, and the side wall is located between the top wall and the side wall; one end, opposite to the top wall, of the containing cavity is provided with an opening, the side walls comprise a first side wall, a second side wall and an arc transition area, the first side wall is located on one side, in the second direction, of the protruding part, the second side wall is located on one side, in the first direction, of the body part, and the first side wall and the second side wall are connected through the arc transition area; the included angle between the first side wall and the second side wall is an obtuse angle; and the packaging cover covers the opening in a sealing manner. According to the shell disclosed by the utility model, when gas expansion is generated in the shell, the arc transition area deforms in the direction far away from the battery cell in the shell, so that the safety of the battery cell is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a battery field especially is related to a casing and battery. BACKGROUND

[0002] With the continuous development of electronic equipment, the battery as its main energy supply device, its performance and reliability are particularly important. The traditional rectangular battery due to its simple structure, mature manufacturing process, is widely used in various electronic equipment. However, with the development of electronic equipment to light and thin, miniaturization, multi-functional direction, special-shaped battery (such as L-shaped battery) gradually becomes an important choice. Special-shaped battery can better adapt to the layout of the internal space of equipment, improve the space utilization, thereby meeting the needs of equipment design.

[0003] However, the existing special-shaped battery often appears the phenomenon of cell bulging in the long-term use. The cell bulging is due to the gas produced by the internal chemical reaction of the battery cannot be discharged in time, leading to the increase of the internal pressure of the battery, thereby causing the deformation of the battery shell. For special-shaped battery, especially L-shaped battery, the corner region will appear more serious deformation after bulging. The included angle between the battery side wall of the corner region is usually set to 90°, and the special-shaped battery shell will deform towards the cell in the shell under the extrusion of the internal pressure, so that the cell of the special-shaped battery is damaged. UTILITARIAN CONTENT

[0004] The utility model aims at at least one of the technical problems existing in the prior art. For this purpose, one object of the utility model is to provide a casing and battery, by setting the included angle of the first side wall and the second side wall at the circular arc transition area of the casing as obtuse angle, when the gas expansion in the casing deforms in the direction away from the cell in the casing, the safety of the cell is improved.

[0005] In the first direction, the embodiment of the utility model provides a casing for packaging cell, comprising:

[0006] The package includes a body portion and a protruding portion located on one side of the body portion along a first direction and perpendicular to the body portion, and defines a receiving cavity for accommodating an electric core. The package includes a top wall and a side wall surrounding the top wall. An end of the receiving cavity opposite to the top wall has an opening. The side wall includes a first side wall located on one side of the protruding portion along a second direction, a second side wall located on one side of the body portion along the first direction, and a circular arc transition region connecting the first side wall and the second side wall, and an included angle between the first side wall and the second side wall is obtuse. A package cover covers the opening. The circular arc transition region has a first end point and a second end point. The circular arc transition region is tangent to the first side wall at the first end point and tangent to the second side wall at the second end point. A chamfer radius at an intersection of the circular arc transition region and the top wall is greater than a chamfer radius at an intersection of any one of the first side wall and the second side wall and the top wall. The top wall is provided with a pressure relief groove extending along a curve and parallel to the circular arc transition region.

[0007] The angle between the two side walls at the corner of the prior art special-shaped battery shell is a right angle. When gas expansion occurs in the shell, the prior art special-shaped battery is deformed and shrunk towards the corner under the extrusion of internal gas pressure, thereby causing damage to the internal electric core. In the shell of the utility model, the angle between the first side wall and the second side wall at the circular arc transition region is obtuse. When gas expansion occurs in the shell, the circular arc transition region, the first side wall and the second side wall all have a tendency to deform away from the electric core. In this way, even when the shell expands, the electric core arranged in the shell will not be damaged. When the deformation amount of the shell structure at the circular arc transition region, the first side wall and the second side wall is too large, a crack is generated at the pressure relief groove, so that the gas in the shell can be discharged, thereby improving the safety of the battery in use.

[0008] In some embodiments, the radius R of the pressure relief groove 刻槽 satisfies: , and / or the width L of the pressure relief groove 刻槽 satisfies: , and / or the depth H of the pressure relief groove 刻槽 satisfies: .

[0009] According to some embodiments of the utility model, the first chamfer section is symmetrical about the inflection point, and the chamfer radius R0 of the first chamfer section at the first end point and the second end point is equal.

[0010] According to some embodiments of the utility model, the chamfer radius R1 of the inflection point of the first chamfer section satisfies: .

[0011] In some embodiments, the first side wall is provided with a second chamfer section at the connection with the top wall, the chamfer radius R2 of the second chamfer section satisfies: ; and / or, the second side wall is provided with a third chamfer section at the connection with the top wall, the chamfer radius R3 of the third chamfer section satisfies: .

[0012] According to some embodiments of the present application, the chamfer radius R0 of the first chamfer section at the first and second end points, the chamfer radius R1 of the first chamfer section at the inflection point, the chamfer radius R2 of the second chamfer section, and the chamfer radius R3 of the third chamfer section satisfy: .

[0013] In some embodiments, in a reference plane, the included angle θ between the circular arc transition zone and the packaging cover satisfies: , the reference plane passes through the inflection point of the circular arc transition zone and the corner of the body part opposite to the circular arc transition zone, and the reference plane is perpendicular to the packaging cover.

[0014] In some embodiments, further comprising: an insulating glue, the insulating glue covers the circular arc transition zone, and both ends of the insulating glue extend to the first and second side walls respectively.

[0015] In a second aspect, the embodiments of the present application further provide a battery, comprising:

[0016] The shell described above; a cell, the cell is packaged in the accommodating cavity of the shell, the cell comprises a first extension and a second extension, the second extension is located on one side of the first extension along the first direction, the first extension is located in the region of the accommodating cavity corresponding to the body part, and the second extension is located in the region of the accommodating cavity corresponding to the protruding part.

[0017] The battery of the present application, due to the use of the above-mentioned shell, when the shell expands due to the gas in the battery, the circular arc transition zone of the shell deforms away from the cell side, avoiding damaging the cell, and is beneficial to improve the safety of the battery during use.

[0018] Additional aspects and advantages of the present application will be partially given in the following description, some of which will become apparent from the following description, or will be understood by those skilled in the art through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent from the description of embodiments given below with reference to the accompanying drawings, in which:

[0020] Figure 1 is a structural schematic view of a shell of an embodiment of the present application;

[0021] Figure 2 is a structural schematic view of a package of an embodiment of the present application;

[0022] Figure 3 is an enlarged structural schematic view of a first chamfered section of an embodiment of the present application;

[0023] Figure 4 is a structural schematic view of a shell of an embodiment of the present application;

[0024] Figure 5 is Figure 4 is a sectional view at D-D in FIG. 1;

[0025] Figure 6 is a structural schematic view of a package of an embodiment of the present application, wherein a pressure relief groove is arranged on the package;

[0026] Figure 7 is a structural schematic view of a pressure relief groove of an embodiment of the present application.

[0027] Reference signs:

[0028] 100 - shell;

[0029] 110 - package; 111 - body part; 1111 - top wall; 1112 - side wall; 1112a - first side wall; 1112b - second side wall; 1112c - circular arc transition region; 112 - protruding part; 113 - accommodating cavity; 114 - first chamfered section; 115 - second chamfered section; 116 - third chamfered section;

[0030] 120 - package cover;

[0031] 130 - insulating glue;

[0032] A - first end point; B - second end point; C - inflection point. DETAILED DESCRIPTION

[0033] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application and cannot be understood as a limitation of the present application.

[0034] The prior art special-shaped battery, when the battery shell expands due to gas generated in the battery, the corner area will deform towards the battery cell after expansion, and the deformed shell will cause damage to the battery cell. Therefore, the utility model provides a shell and a battery, by setting the included angle between the first side wall and the second side wall at the arc transition area of the shell as an obtuse angle, when the shell expands due to gas generated in the shell, the deformation is towards the direction away from the battery cell in the shell, thereby improving the safety of the battery cell.

[0035] The utility model discloses a shell and a battery, and a kind of shell 100 of the utility model embodiment is described below with reference to Figures 1 to 7 , the shell 100 of this embodiment is used to package battery cell, and battery cell can be laminated core, and can be roll core. Shell 100 can include package body 110 and package cover 120.

[0036] With reference to Figure 1 And Figure 2 , package body 110 can include body part 111 and protruding part 112, protruding part 112 is located at the side of body part 111 along first direction (such as Y direction in Figure 1 ), and it is perpendicular to body part 111, so that the shell 100 for packaging L-shaped battery cell is formed, and package body 110 defines containing cavity 113 for accommodating battery cell, and L-shaped battery cell is arranged in containing cavity 113.

[0037] Package body 110 can include top wall 1111 and side wall 1112, and side wall 1112 surrounds top wall 1111, and one end of containing cavity 113 opposite to top wall 1111 has opening, in other words, side wall 1112 extends along the circumferential side of top wall 1111, and is connected head to tail, to form semi-closed structure, and top wall 1111 of containing cavity 113 and opening are respectively located at both ends of semi-closed structure formed by side wall 1112 along third direction (Z direction shown in Figure 1 ).

[0038] Among them, side wall 1112 can include first side wall 1112a, second side wall 1112b and arc transition area 1112c, first side wall 1112a is located at the side of protruding part 112 along second direction (such as X direction shown in Figure 1 ), second side wall 1112b is located at the side of body part 111 along first direction, and first side wall 1112a and second side wall 1112b are connected through arc transition area 1112c, and the included angle between first side wall 1112a and second side wall 1112b is obtuse, so that when shell 100 is subjected to extrusion force from the outside of containing cavity 113, first side wall 1112a, second side wall 1112b and arc transition area 1112c all have the trend of deforming away from containing cavity 113.

[0039] It can be understood that the side wall 1112 further comprises a third side wall extending along the periphery of the top wall 1111, one end of the third side wall being connected to the side of the first side wall 1112a away from the circular arc transition region 1112c, and the other end being connected to the end of the second side wall 1112b away from the circular arc transition region 1112c.

[0040] The packaging cover 120 is sealed to the opening. In this way, the packaging body 110 and the packaging cover 120 form a closed structure, which protects the battery cell.

[0041] Alternatively, the packaging body 110 and the packaging cover 120 in the embodiment can be an integrated structure, which is punched on a raw material film to form the packaging body 110, the non-punched area of the raw material film is folded towards the packaging body 110 to seal the opening of the accommodation cavity 113 and form the packaging cover 120, and after the battery cell is packaged in the accommodation cavity 113, the joint between the packaging body 110 and the packaging cover 120 is sealed.

[0042] The packaging body 110 is further provided with a pressure relief groove, which is arranged on the top wall 1111 of the packaging body 110, extends in a curved manner, and is arranged in parallel with the circular arc transition region. When the structural deformation of the shell 100 at the circular arc transition region 1112c, the first side wall 1112a and the second side wall 1112b is too large, a crack is generated at the pressure relief groove, so that the gas in the shell 100 can be discharged, improving the safety of the battery.

[0043] Compared with the prior art, the angle between the two side walls 1112 at the corner of the special-shaped battery shell in the prior art is a right angle. When the gas in the shell 100 expands, the two side walls 1112 connected to the corner will deform and shrink towards the corner under the extrusion of the internal gas pressure, thereby damaging the battery cell inside. In the shell 100 of the utility model, the included angle between the first side wall 1112a and the second side wall 1112b at the circular arc transition region 1112c is obtuse. When the gas in the shell 100 expands, the shell 100 structure at the circular arc transition region 1112c, the first side wall 1112a and the second side wall 1112b has a tendency to deform away from the battery cell. In this way, even when the shell 100 expands, the battery cell arranged in the shell 100 will not be damaged, thereby improving the safety of the battery.

[0044] Reference Figure 6 and Figure 7 In some embodiments, the radius R of the pressure relief groove is 刻槽 The size is: For example, R 刻槽 may be 2mm, 3mm, 4mm, 5mm or 6mm. The width L 刻槽 The size is: For example, L 刻槽 may be 0.05mm, 0.08mm, 0.1mm or 0.12mm. The depth H 刻槽 The size is: For example, H 刻槽 may be 0.03mm, 0.05mm, 0.07mm or 0.08mm. Of course, the pressure relief groove can also be other sizes, and the embodiments are not limited thereto. Illustratively, the pressure relief groove can be a V-shaped groove formed on the top wall 1111 of the package body, and the opening of the groove faces away from the side of the battery cell. The pressure relief groove has a suitable size, so that when the structural deformation of the shell 100 at the circular arc transition area 1112c, the first side wall 1112a and the second side wall 1112b is too large, a crack is generated at the pressure relief groove, so that the gas inside the shell 100 can be discharged, providing a gas discharge channel for the shell 100 and improving the safety of the battery in use.

[0045] Referring to Figure 1 and Figure 3 In some embodiments, the circular arc transition area 1112c can have a first end point A and a second end point B, the circular arc transition area 1112c is tangent to the first side wall 1112a at the first end point A, and the circular arc transition area 1112c is tangent to the second side wall 1112b at the second end point B, so as to ensure smooth connection between the circular arc transition area 1112c and the first side wall 1112a and the second side wall 1112b, reduce stress concentration at the circular arc transition area 1112c, and improve the structural strength of the circular arc transition area 1112c.

[0046] The chamfer radius at the intersection of the circular arc transition area 1112c and the top wall 1111 is greater than the chamfer radius at the intersection of any one of the first side wall 1112a and the second side wall 1112b and the top wall 1111. In other words, the chamfer radius at the intersection of the circular arc transition area 1112c and the top wall 1111 is greater than the chamfer radius at the intersection of the first side wall 1112a and the top wall 1111, and the chamfer radius at the intersection of the second side wall 1112b and the top wall 1111. In this way, the connection strength between the circular arc transition area 1112c and the top wall 1111 is further improved, and the structural strength of the package body 110 is further enhanced.

[0047] Referring to Figure 1According to some embodiments of the present application, the first chamfer section 114 is symmetrical about the inflection point C, and the chamfer radius R0 of the first chamfer section 114 at the first endpoint A and the second endpoint B is equal. In this way, the structure design of the first chamfer section 114 being symmetrical about the inflection point C makes the stress distribution in the arc transition area 1112c more uniform, thereby making the packaging body 110 exhibit better structural stability when stressed.

[0048] Adopting the test Figure 1 And Figure 3 According to some embodiments of the present application, the first chamfer section 114 is symmetrical about the inflection point C, and the chamfer radius R0 of the first chamfer section 114 at the first endpoint A and the second endpoint B is equal. In this way, the structure design of the first chamfer section 114 being symmetrical about the inflection point C makes the stress distribution in the arc transition area 1112c more uniform, thereby making the packaging body 110 exhibit better structural stability when stressed.

[0049] According to some embodiments of the present application, the chamfer radius R1 at the inflection point C of the first chamfer section 114 satisfies: For example, R1 can be 1mm, 1.5mm, 2mm, 2.5mm or 3mm, of course, the chamfer radius R1 at the inflection point C of the first chamfer section 114 can also be other values, and the designer can choose according to the needs, and this embodiment does not limit this.

[0050] In this way, on the one hand, the chamfer radius of the first chamfer section 114 is avoided to be too small, for example, less than 1mm, so that the first chamfer section 114 has poor stress dispersion effect, on the other hand, the chamfer radius of the first chamfer section 114 is avoided to be too large, for example, more than 3mm, to avoid the first chamfer section 114 excessively occupying the internal space of the accommodation cavity 113 and short-circuiting with the battery cell, resulting in damage to the battery.

[0051] Reference Figure 1 And Figure 3 According to some embodiments of the present application, the first side wall 1112a and the top wall 1111 are connected with the second chamfer section 115, and the chamfer radius R2 of the second chamfer section 115 satisfies: For example, R2 can be 0.5 mm, 1 mm or 1.5 mm. Of course, the chamfer radius R2 of the second chamfer section 115 can also be other values, which can be selected by the designer according to the needs, and the embodiment does not make any limitation.

[0052] In this way, on the one hand, the chamfer radius of the second chamfer section 115 is prevented from being too small, for example, less than 0.5 mm, so that the stress dispersion effect of the second chamfer section 115 is poor, and on the other hand, the chamfer radius of the second chamfer section 115 is prevented from being too large, for example, more than 1.5 mm, so as to avoid that the second chamfer section 115 excessively occupies the internal space of the accommodating cavity 113 and causes short circuit with the battery cell, resulting in damage of the battery.

[0053] The third chamfer section 116 is arranged at the connection between the second side wall 1112b and the top wall 1111, and the chamfer radius R3 of the third chamfer section 116 satisfies: For example, R3 can be 0.5 mm, 1 mm or 1.5 mm. Of course, the chamfer radius R3 of the second chamfer section 115 can also be other values, which can be selected by the designer according to the needs, and the embodiment does not make any limitation.

[0054] In this way, on the one hand, the chamfer radius of the third chamfer section 116 is prevented from being too small, for example, less than 0.5 mm, so that the stress dispersion effect of the third chamfer section 116 is poor, and on the other hand, the chamfer radius of the third chamfer section 116 is prevented from being too large, for example, more than 1.5 mm, so as to avoid that the third chamfer section 116 excessively occupies the internal space of the accommodating cavity 113 and causes short circuit with the battery cell, resulting in damage of the battery.

[0055] With reference to Figure 1 and Figure 3 According to some embodiments of the present application, the chamfer radius R0 of the first chamfer section 114 at the first endpoint A and the second endpoint B, the chamfer radius R1 of the first chamfer section 114 at the inflection point C, the chamfer radius R2 of the second chamfer section 115 and the chamfer radius R3 of the third chamfer section 116 satisfy: Preferably, R0 = 1.3R2 and R1 = 2R2.

[0056] In this way, by further designing the chamfer radius of the first chamfer section 114, the second chamfer section 115 and the third chamfer section 116, the stress distribution of the packaging body 110 is more uniform, thereby improving the structural strength and stability of the packaging body 110. The gradually changing and reasonable chamfer radius design helps to smoothly transition between the side wall 1112 and the top wall 1111, reduces the stress concentration point, thereby prolonging the service life of the packaging body 110 and improving the overall durability of the battery.

[0057] With reference to Figure 4 and Figure 5In some embodiments, the included angle θ between the circular arc transition region 1112c and the packaging cover 120 satisfies: For example, the angle θ can be 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85° or 90°. Of course, the angle θ can also be other values, which can be selected according to requirements, and the embodiments are not limited in this regard. The reference plane passes through the inflection point C of the circular arc transition region 1112c and the corner of the body portion 111 opposite to the circular arc transition region 1112c, and the reference plane is perpendicular to the packaging cover 120.

[0058] In this way, the end of the circular arc transition region 1112c close to the packaging cover 120 is inclined into the accommodation cavity 113, and the end of the first chamfer section 114 is inclined away from the packaging cavity. When the internal pressure of the shell 100 is too large and expands, the deformation first occurs at the end of the circular arc transition region 1112c away from the packaging cavity, i.e., the first chamfer section 114, at this time, the deformation of the circular arc transition region 1112c is away from the accommodation cavity 113, and the electric core in the accommodation cavity 113 is not damaged.

[0059] Reference Figure 2 In some embodiments, the shell 100 can further include an insulating glue 130 covering the circular arc transition region 1112c, and the two ends of the insulating glue 130 extend to the first side wall 1112a and the second side wall 1112b, respectively. On the one hand, the insulating glue 130 can insulate and close the shell 100, so as to avoid short circuit caused by direct contact between other charged structures and the shell 100, thereby preventing the battery from being damaged. On the other hand, the insulating glue 130 can also enhance the structural strength of the shell 100.

[0060] Optionally, the insulating glue 130 can also extend from the second side wall 1112b to the third side wall and be connected to the insulating glue 130 on the first side wall 1112a, in other words, the insulating glue 130 can cover the entire side wall 1112.

[0061] In a second aspect, the embodiments of the utility model also provide a battery, which can include the above-mentioned shell 100 and an electric core.

[0062] The electric core is packaged in the accommodation cavity 113 of the shell 100, and the electric core includes a first extension portion and a second extension portion. The second extension portion is located on one side of the first extension portion along a first direction. The first extension portion is located in a region of the accommodation cavity 113 corresponding to the body portion 111, and the second extension portion is located in a region of the accommodation cavity 113 corresponding to the protruding portion 112.

[0063] The utility model discloses a battery, because adopt the casing 100 above, when the casing 100 expands when the gas in the battery appears, the arc transition area 1112c of casing 100 deforms to the side away from the electric core, avoids damaging the electric core, and it is favorable to improve the security in the use of battery.

[0064] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model.

[0065] In the description of the utility model, "first feature", "second feature" can include one or more features.

[0066] In the description of the utility model, "multiple" means two or more.

[0067] In the description of the utility model, the "above" or "below" of the first feature in the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them.

[0068] In the description of the utility model, the "above", "upper" and "upper surface" of the first feature in the second feature include that the first feature is directly above and obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature.

[0069] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A housing (100) for encapsulating a battery cell, characterized in that, include: A package (110) includes a body portion (111) and a protrusion (112) located on one side of the body portion (111) along a first direction. The package (110) defines a receiving cavity (113) for receiving a battery cell. The package (110) includes a top wall (1111) and a side wall (1112) surrounding the top wall (1111). The receiving cavity (113) has an opening at one end opposite to the top wall (1111). The body (111) includes a first sidewall (1112a), a second sidewall (1112b), and an arc transition area (1112c). The first sidewall (1112a) is located on one side of the protrusion (112) along the second direction, and the second sidewall (1112b) is located on one side of the body (111) along the first direction. The first sidewall (1112a) and the second sidewall (1112b) are connected by the arc transition area (1112c), and the angle between the first sidewall (1112a) and the second sidewall (1112b) is set to an obtuse angle. A sealing cap (120) is provided to cover the opening. The arc transition region (1112c) has a first endpoint (A) and a second endpoint (B). The arc transition region (1112c) is tangent to the first sidewall (1112a) at the first endpoint (A), and the arc transition region (1112c) is tangent to the second sidewall (1112b) at the second endpoint (B). The chamfer radius at the intersection of the arc transition area (1112c) and the top wall (1111) is greater than the chamfer radius at the intersection of either the first side wall (1112a) or the second side wall (1112b) with the top wall (1111). The top wall (1111) is provided with a pressure relief groove, which extends along the curved direction and is parallel to the arc transition area (1112c).

2. The housing (100) according to claim 1, characterized in that, The radius R of the pressure relief groove 刻槽 Meets the requirement of 2mm <R 刻槽 <6mm, and / or, The width L of the pressure relief groove 刻槽 Meets the requirement of 0.05mm. <L 刻槽 <0.12mm, and / or, Depth H of the pressure relief groove 刻槽 Meets the requirement of 0.03mm <H 刻槽 <0.08mm.

3. The housing (100) according to claim 1, characterized in that, A first chamfered section (114) is provided at the connection between the arc transition area (1112c) and the top wall (1111). The first chamfered section (114) has an inflection point (C) located between the first endpoint (A) and the second endpoint (B). In the direction from the first endpoint (A) to the inflection point (C), the chamfer radius of the first chamfered section (114) gradually increases, and / or, In the direction from the inflection point (C) to the second endpoint (B), the chamfer radius of the first chamfer segment (114) gradually decreases.

4. The housing (100) according to claim 3, characterized in that, The first chamfer segment (114) is symmetrical about the inflection point (C), and the chamfer radius R0 of the first chamfer segment (114) is equal at the first endpoint (A) and the second endpoint (B).

5. The housing (100) according to claim 3, characterized in that, The chamfer radius R1 at the inflection point (C) of the first chamfer segment (114) satisfies: 1mm≤R1≤3mm.

6. The housing (100) according to claim 3, characterized in that, A second chamfered section (115) is provided at the connection between the first sidewall (1112a) and the top wall (1111), and the chamfer radius R2 of the second chamfered section (115) satisfies: 0.5mm ≤ R2 ≤ 1.5mm; and / or, The second sidewall (1112b) is provided with a third chamfer section (116) at the connection between the top wall (1111) and the third chamfer section (116), and the chamfer radius R3 of the third chamfer section (116) satisfies: 0.5mm≤R3≤1.5mm.

7. The housing (100) according to claim 6, characterized in that, The chamfer radius R0 of the first chamfer segment (114) at the first endpoint (A) and the second endpoint (B), the chamfer radius R1 of the first chamfer segment (114) at the inflection point (C), the chamfer radius R2 of the second chamfer segment (115), and the chamfer radius R3 of the third chamfer segment (116) satisfy: R2=R3≤R0≤R1.

8. The housing (100) according to claim 1, characterized in that, Within the reference surface, the included angle θ between the arc transition area (1112c) and the encapsulation cover (120) satisfies: 50°≤θ≤90°. The reference surface passes through the inflection point (C) of the arc transition area (1112c) and the corner of the body part (111) opposite to the arc transition area (1112c), and the reference surface is perpendicular to the encapsulation cover (120).

9. The housing (100) according to claim 1, characterized in that, Also includes: An insulating adhesive (130) covers the arc transition area (1112c), and the two ends of the insulating adhesive (130) extend to the first sidewall (1112a) and the second sidewall (1112b), respectively.

10. A battery, characterized in that, include: The housing (100) according to any one of claims 1-9; The battery cell is encapsulated in the receiving cavity (113) of the housing (100). The battery cell includes a first extension and a second extension. The second extension is located on one side of the first extension along the first direction. The first extension is located in the region of the receiving cavity (113) corresponding to the body portion (111). The second extension is located in the region of the receiving cavity (113) corresponding to the protrusion (112).

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