CN218586135U

CN218586135U - Shell, battery cell, battery and electric equipment

Info

Publication number: CN218586135U
Application number: CN202223022765.4U
Authority: CN
Inventors: 柳宁; 吴华
Original assignee: Ningde Amperex Technology Ltd
Current assignee: Ningde Amperex Technology Ltd
Priority date: 2022-11-12
Filing date: 2022-11-12
Publication date: 2023-03-07
Anticipated expiration: 2032-11-12

Abstract

A case includes a frame and a first cover connected in a first direction. The frame body comprises a side wall, and the side wall surrounds to form an accommodating space. One end of the side wall facing the first cover body is provided with a first step part, and the first step part is formed on one side of the side wall facing the accommodating space or on one side of the side wall deviating from the accommodating space. The first cover body comprises a bottom wall and a connecting wall. Along first direction, diapire and lateral wall interval set up, and the projection of diapire is located accommodation space. The connecting wall comprises a first part and a second part, the first part extends from the edge of the bottom wall to the first step part and is located outside the first step part, and the second part extends from the first part to the inside of the first step part. The first part extends in an arc shape in the first direction, and the second part abuts against the first step part. Above-mentioned casing is convenient for the adaptation has the battery compartment at fillet corner, improves the commonality of casing. The application also provides a battery core, a battery and electric equipment comprising the shell.

Description

Shell, battery cell, battery and electric equipment

Technical Field

The application relates to the technical field of energy storage, in particular to a shell, a battery cell, a battery and electric equipment.

Background

The existing cell shell is generally made of a metal sheet through a stretching or stamping process. The junction of the side wall and the bottom wall of the housing can form a plurality of right-angled corners, so that the housing cannot be adapted to battery bins with corners of various shapes.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for a housing that can accommodate battery compartments having corners of various shapes, and that improves the versatility of the housing.

An embodiment of the present application provides a housing, including a frame and a first lid that are connected in order along a first direction. The frame body comprises a side wall which surrounds and forms an accommodating space. One end of the side wall facing the first cover body is provided with a first step part, and the first step part is formed on one side of the side wall facing the accommodating space or one side of the side wall deviating from the accommodating space. The first cover body comprises a bottom wall and a connecting wall. Along first direction, diapire and lateral wall interval set up, and the projection of diapire is located lateral wall and accommodation space's projection range. The connecting wall comprises a first part and a second part, the first part extends from the edge of the bottom wall to the first step part and is located outside the first step part, and the second part extends from the first part to the inside of the first step part. The first part extends in an arc shape in the first direction, and the second part abuts against the first step part.

Among the above-mentioned casing, the first portion is the arc extension setting on the first direction to make the connecting wall form the transition face that is the arcwall face and extends between diapire and lateral wall, and then the adaptation of being convenient for has the battery compartment at fillet corner, improve the commonality of casing. The second part is abutted against the first step part so as to improve the connection strength between the first cover body and the frame body.

In some embodiments of the present application, along the first direction, the projection of the connecting wall is located within the projection range of the side wall and the accommodating space, so as to improve the space utilization rate of the housing.

In some embodiments of the present application, the first portion extends in a first direction in a circular arc manner, and a radius R of a circle where the circular arc is located satisfies: r is more than or equal to 0.2mm. In order to adapt to the battery compartment with the round corner and the round radius larger than or equal to 2mm, which has higher utilization rate at present, the universality of the shell is improved.

In some embodiments of the present application, the angle β between the direction of extension of the second portion and the first direction satisfies: beta is more than or equal to 0 degree and less than or equal to 5 degrees. When the angle β =0 °, the end face of the second portion facing the first step surface is parallel to the first step surface, so that the end face of the second portion facing the first step surface completely abuts against the first step surface, thereby improving the stability of abutment between the second portion and the first step surface. When beta is larger than 0 degree and smaller than or equal to 5 degrees, the end face of the second part facing the first step face is inclined relative to the first step face, and the end face of the second part facing the first step face is partially abutted against the first step face, so that a gap filled with welding materials or bonding materials is formed, and the abutting stability between the second part and the first step face is improved.

In some embodiments of the present application, the thickness of the bottom wall and the connecting wall are the same and defined as a first thickness T1 of the first cover body, and a relationship between the first thickness T1 of the first cover body and a second thickness T2 of the side wall satisfies: t1 is less than T2. Compare with the same mode of the thickness of the lateral wall of current casing and diapire, can reduce space and the quality that first lid occupy when first lid and framework satisfy sealed condition, be convenient for improve the energy density of the electric core including the casing.

In some embodiments of the present application, the step portion includes a first step surface provided in the first direction, and a second step surface provided in a thickness direction of the side wall, the first step surface and the second step surface being adjacently provided and forming a space accommodating the second portion.

In some embodiments of the present application, along the thickness direction of the side wall, a relationship between the first length d1 of the first step surface and the first thickness T1 of the first cover satisfies: t1 < d1, so that a gap is arranged between the first step part and the second part.

In some embodiments of the present application, a relationship between the first length d1 of the first step face and the second thickness T2 of the side wall in the thickness direction of the side wall satisfies: t2 is more than 0.15mm and less than 2mm, and d1 is more than or equal to 0.05mm and less than or equal to 0.5T2, so that the thickness of the limited side wall corresponding to the second step surface is limited, and the second step surface has enough structural strength to be connected with the second part.

In some embodiments of the present application, along the first direction, a relationship between the second length d2 of the second step face and the height h1 of the second portion satisfies: d2 is more than 0.2mm, and d2 is less than h1, so that the second part is at least partially abutted against the first step surface.

In some embodiments of this application, the lateral wall includes a plurality of wall portions and chamfer portion, and the wall portion encircles the setting, and chamfer portion connects between two adjacent wall portions, observes along first direction, and chamfer portion is the arc and extends the setting to reduce the risk that the lateral wall bumps scratch battery compartment

In some embodiments of the present application, the casing further includes a second cover body, and the second cover body is hermetically connected to an end of the side wall away from the first cover body.

An embodiment of the present application further provides a battery cell, which includes the casing in any of the above embodiments, and an electrode assembly is disposed in the accommodating space.

The embodiment of the application also provides a battery, which comprises the battery core in the embodiment.

An embodiment of the present application further provides an electric device, including the battery in the above embodiment.

In casing, electric core, battery and consumer of this application, the first portion is the arc extension setting on the first direction to make the connecting wall form the transition face that is the arcwall face and extends between diapire and lateral wall, and then the adaptation of being convenient for has the battery compartment at fillet corner, improves the commonality of casing. The second part is abutted against the first step part so as to improve the connection strength between the first cover body and the frame body.

Drawings

Fig. 1 is a first structural schematic diagram of a housing in an embodiment of the present application.

Fig. 2 is a schematic diagram of a disassembled structure of the housing in an embodiment of the present application.

Fig. 3 is a second structural schematic of the housing in an embodiment of the present application.

Fig. 4 isbase:Sub>A cross-sectional view of fig. 1 taken along section linebase:Sub>A-base:Sub>A.

Fig. 5 is a cross-sectional view of fig. 3 taken along section line B-B.

Fig. 6 is a schematic view of the extension direction of the second part of the housing in an embodiment of the present application.

Fig. 7 is a schematic structural diagram of a cell in an embodiment of the present application.

Fig. 8 is a schematic diagram of the structure of a battery in one embodiment of the present application.

Fig. 9 is a schematic view showing a structure of an electric device in a comparative example of the present application.

Description of the main elements

Case 100

Battery cell 200

Battery 300

Electrical device 400

Frame 10

Accommodating space 10a

Side wall 11

Wall part 11a

Chamfered part 11b

First step 111

First step surface 111a

Second step surface 111b

First surface 112

Second surface 113

Third surface 114

Liquid injection hole 115

Communication hole 116

First cover 20

Bottom wall 21

Connecting wall 22

First part 221

Second portion 222

Gap 23

Second cover body 30

Electrode assembly 41

Seal 42

Electrical connector 43

First direction Z

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, 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 terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

It should be understood that, considering the factors of practical machining tolerance, in the technical solution of the present application, when two elements are disposed in the same direction when they are disposed in parallel/perpendicular, there may be a certain included angle between the two elements, and there may be a tolerance of 0- ± 10% between the two elements, or a tolerance of greater than, equal to, or less than the tolerance of 0- ± 10% between the two elements.

An embodiment of the present application provides a housing, including a frame and a first lid that are connected in order along a first direction. The frame body comprises a side wall, and the side wall surrounds the side wall and forms an accommodating space. One end of the side wall facing the first cover body is provided with a first step part, and the first step part is formed on one side of the side wall facing the accommodating space or on one side of the side wall deviating from the accommodating space. The first cover body comprises a bottom wall and a connecting wall. Along first direction, diapire and lateral wall interval set up, and the projection of diapire is located lateral wall and accommodation space's projection range. The connecting wall comprises a first part and a second part, the first part extends from the edge of the bottom wall to the first step part and is located outside the first step part, and the second part extends from the first part to the inside of the first step part. The first part extends in an arc shape in the first direction, and the second part abuts against the first step part.

Embodiments of the present application will be further described with reference to the accompanying drawings.

Referring to fig. 1 and 2 together, an embodiment of the present application provides a casing 100, where the casing 100 may be, but is not limited to, used for accommodating an electrode assembly to form a cell structure.

The case 100 includes a frame 10 and a first cover 20 connected in this order in the first direction Z. The frame body 10 includes a sidewall 11, and the sidewall 11 surrounds and forms an accommodating space 10a. The first cover 20 is hermetically connected to an end of the side wall 11 facing the first cover 20, and is used for sealing an opening of the frame 10 communicating with the accommodating space 10a. Alternatively, the side wall 11 may be made of a plate material with the same thickness, or a plurality of plate materials with the same thickness may be made by welding or the like.

Referring to fig. 2 and fig. 3, a first step portion 111 is disposed at an end of the side wall 11 facing the first cover 20, and the first step portion 111 is formed at a side of the side wall 11 facing the accommodating space 10a or at a side of the side wall 11 away from the accommodating space 10a. Viewed in the first direction Z, the first step portion 111 is disposed around, and a projection of the first step portion 111 in the first direction Z is located within a projection range of the side wall 11.

Referring to fig. 4 and 5, in particular, the thickness direction of the sidewall 11 is perpendicular to the first direction Z. The sidewall 11 includes a first surface 112, a second surface 113, and a third surface 114. The first surface 112 is located on a side of the side wall 11 facing the first cover 20 in the first direction Z. The second surface 113 and the third surface 114 are oppositely disposed in the thickness direction of the sidewall 11, the second surface 113 is located at a side of the sidewall 11 facing the accommodating space 10a in the thickness direction of the sidewall 11, and the third surface 114 is located at a side of the sidewall 11 facing away from the accommodating space 10a in the thickness direction of the sidewall. The first step portion 111 includes a first step surface 111a provided in the first direction Z and a second step surface 111b provided in the thickness direction of the side wall 11, and the first step surface 111a and the second step surface 111b are provided adjacent to each other.

When the first step 111 is formed at a side of the sidewall 11 facing the accommodating space 10a, the first step 111 is located at a junction of the first surface 112 and the second surface 113, and the first step surface 111a is recessed with respect to the first surface 112 and is parallel to the first surface 112, and the second step surface 111b is recessed with respect to the second surface 113 and is parallel to the second surface 113. When the first step 111 is formed at a side of the sidewall 11 facing away from the accommodating space 10a, the first step 111 is located at a connection of the first surface 112 and the third surface 114, the first step 111a is recessed relative to the first surface 112 and is parallel to the first surface 112, and the second step 111b is recessed relative to the third surface 114 and is parallel to the third surface 114.

With continued reference to fig. 4 and 5, the first cover 20 includes a bottom wall 21 and a connecting wall 22. Alternatively, the bottom wall 21 and the connecting wall 22 may be made of a plate material with the same thickness, or made of a plate material with the same thickness by welding or the like.

The bottom wall 21 and the side wall 11 are spaced apart in the first direction Z such that the bottom wall 21 is located outside the accommodating space 10a. The projection of the bottom wall 21 is located within the projection range of the side wall 11 and the accommodating space 10a. The connecting wall 22 includes a first portion 221 and a second portion 222, the first portion 221 extends from the edge of the bottom wall 21 toward the first step portion 111 and is located outside the first step portion 111, the second portion 222 extends from the first portion 221 into the first step portion 111, and a space for accommodating the second portion 222 is formed between the first step surface 111a and the second step surface 111 b.

The first portion 221 extends in an arc shape in the first direction Z, so that the connecting wall 22 forms a transition surface extending in an arc shape between the bottom wall 21 and the side wall 11, thereby facilitating the adaptation of the battery compartment with rounded corners and improving the universality of the housing 100. The second portion 222 abuts against the first step portion 111 to improve the connection strength between the first cover 20 and the frame 10.

It will be appreciated that the housing 100 can also be adapted to a battery compartment having right-angled corners, and the connecting wall 22 forms a transition surface extending in an arc-shaped manner between the bottom wall 21 and the side wall 11, so as to reduce the risk of scratching the battery compartment by impact.

In some embodiments, along the first direction Z, the projection of the connecting wall 22 is located within the projection range of the side wall 11 and the accommodating space 10a, so as to improve the space utilization of the housing 100.

In some embodiments, the first portion 221 extends in the first direction Z in an arc shape, and a radius R of a circle where the arc is located is greater than or equal to 0.2mm, so as to adapt to a battery compartment with a corner fillet and a radius fillet greater than or equal to 0.2mm, which is high in current usage rate, and improve the universality of the casing 100.

Alternatively, the radius R may be 0.2mm, 0.25mm, 0.3mm, 0.4mm, 0.6mm, etc., to satisfy one of any other value within a range greater than or equal to 0.2mm.

With continued reference to fig. 4 and 5, in some embodiments, a gap 23 is disposed between the first step portion 111 and the second portion 222, and the gap 23 is used for filling a welding material or an adhesive material to form a corresponding welding layer or an adhesive layer, so as to improve the connection strength between the first step portion 111 and the second portion 222.

Referring also to fig. 6, in some embodiments, the angle β between the extending direction of the second portion 222 and the first direction Z satisfies: beta is more than or equal to 0 degree and less than or equal to 5 degrees. Optionally, the included angle β may be one of any other values satisfying the range of 0 ° ≦ β ≦ 5 °, such as 0 °, 1 °, 2 °, 3 °, 4 °, 5 °, and the like.

When β =0 °, the end surface of the second portion 222 facing the first step surface 111a is parallel to the first step surface 111a, so that the end surface of the second portion 222 facing the first step surface 111a completely abuts against the first step surface 111a, thereby improving the stability of the abutment between the second portion 222 and the first step surface 111a. At this time, the gap 23 is formed between the second step surface 111b and the side surface of the second portion 222 facing the second step surface 111 b.

When β is smaller than 0 ° < β ≦ 5 °, the end surface of the second portion 222 facing the first step surface 111a is inclined with respect to the first step surface 111a, and the end surface portion of the second portion 222 facing the first step surface 111a abuts against the first step surface 111a. At this time, the gap 23 is formed between the second step surface 111b and the side surface of the second portion 222 facing the second step surface 111b, and between the end surface of the second portion 222 facing the first step surface 111a and the first step surface 111a. By the above arrangement, the adjacent two surfaces of the second portion 222 are connected to the first stepped portion 111 by the welding layer or the adhesive layer, respectively, so that the stability of the contact between the second portion 222 and the first stepped portion 111a is improved.

It can be understood that when the angle β is greater than 0 ° < β ≦ 5 °, the extending direction of the second portion 222 is inclined with respect to the first direction Z, and during the manufacturing process of the housing 100, it is convenient to extend the second portion 222 into the first step portion 111 and make the second portion 222 abut against the first step portion 111.

Referring again to fig. 4, in some embodiments, the thickness of the bottom wall 21 and the connecting wall 22 are the same and defined as a first thickness T1 of the first cover 20, and a relationship between the first thickness T1 of the first cover 20 and a second thickness T2 of the side wall 11 satisfies: t1 is less than T2. Compared with the manner in which the thicknesses of the side wall and the bottom wall of the existing case are the same, the space and the mass occupied by the first cover body 20 can be reduced while the first cover body 20 and the frame body 10 satisfy the sealing condition, which is convenient for improving the energy density of the battery cell including the case 100.

In some embodiments, the relationship between the first length d1 of the first step surface 111a and the first thickness T1 of the first cover body 20 in the thickness direction of the side wall 11 satisfies: t1 < d1 so that a gap 23 is provided between the first step portion 111 and the second portion 222.

In some embodiments, the relationship between the first length d1 of the first step face 111a and the second thickness T2 of the side wall 11 in the thickness direction of the side wall 11 satisfies: t2 is more than 0.15mm and less than 2mm, and d1 is more than or equal to 0.05mm and less than or equal to 0.5T2, so that the thickness of the portion of the side wall 11 corresponding to the second step surface 111b is limited, and the second step surface 111b has enough structural strength to connect with the second portion 222.

Alternatively, the second thickness T2 can be 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 2mm, etc. at any other value within the range of 0 ≦ β ≦ 5.

In some embodiments, along the first direction Z, the relationship between the second length d2 of the second step surface 111b and the height h1 of the second portion 222 satisfies: d2 is greater than 0.2mm, and d2 is less than h1, so that the second portion 222 at least partially abuts against the first step surface 111a.

Referring again to fig. 2, in some embodiments, the sidewall 11 includes a plurality of wall portions 11a and chamfered portions 11b. The wall portions 11a are circumferentially arranged, and the chamfered portion 11b is connected between two adjacent wall portions 11a. Observed along the first direction Z, the chamfer part 11b is arc-shaped and extends to reduce the risk that the battery compartment is scratched by the side wall 11.

Referring to fig. 7, in some embodiments, the casing 100 further includes a second cover 30, the second cover 30 is hermetically connected to an end of the sidewall 11 away from the first cover 20, and is used for sealing an opening of the other side of the frame 10 communicating with the accommodating space 10a.

In some embodiments, the second cover 30 is sealingly connected to the end of the sidewall 11 that is away from the first cover 20.

In some embodiments, a second step portion is disposed at an end of the side wall 11 facing the second cover 30, the second step portion has a similar structure to the first step portion 111, the second cover 30 has a similar structure to the first cover 20, and the structures and the connection relationship between the second step portion and the second cover 30 can refer to the description of the first step portion 111 and the first cover 20, which is not repeated herein.

The present application is illustrated by the following specific embodiments:

example 1

Referring to fig. 1 and fig. 4, the first step portion 111 is formed on a side of the sidewall 11 facing the accommodating space 10 a; the first thickness T1 of the first cover 20 satisfies: t1=0.075mm; the second thickness T2 of the side wall 11 satisfies: t2=0.2mm; the first length d1 of the first step surface 111a satisfies: d1=0.1mm; the second length d2 of the second step surface 111b satisfies: d2=0.2mm; the height h1 of the second portion 222 satisfies: h1=0.3mm; the angle β between the direction of extension of the second portion 222 and the first direction Z satisfies: β =5 °; the first part 221 extends in an arc shape in the first direction Z, and the radius of a circle where the arc is located is equal to 0.6mm; a gap 23 is provided between the first step portion 111 and the second portion 222, and the welding material is filled in the gap 23 to form a welding layer.

Example 2

Referring to fig. 3 and 5, the first step portion 111 is formed on a side of the sidewall 11 away from the accommodating space 10 a; the first thickness T1 of the first cover 20 satisfies: t1=0.05mm; the second thickness T2 of the side wall 11 satisfies: t2=0.3mm; the first length d1 of the first step surface 111a satisfies: d1=0.1mm; the second length d2 of the second step surface 111b satisfies: d2=0.3mm; the height h1 of the second portion 222 satisfies: h1=0.5mm; the angle β between the direction of extension of the second portion 222 and the first direction Z satisfies: β =0 °; the first part 221 extends in an arc shape in the first direction Z, and the radius of a circle where the arc is located is equal to 0.4mm; a gap 23 is provided between the first step portion 111 and the second portion 222, and the welding material is filled in the gap 23 to form a welding layer.

Referring to fig. 7, an embodiment of the present application further provides a battery cell 200, where the battery cell 200 includes the casing 100 in any of the embodiments. The battery cell 200 further includes an electrode assembly 41, a seal member 42, and an electrical connection member 43. The electrode assembly 41 is accommodated in the accommodating space 10a for charge and discharge reactions. Alternatively, the electrode assembly 41 is formed by stacking or winding a positive electrode tab, a separator, and a negative electrode tab, which are sequentially disposed. The side wall 11 is provided with a liquid inlet 115 and a communication hole 116 for communicating the storage space 10a. The pour hole 115 is used for pouring the electrolyte into the housing space 10a, and the packing 42 is sealingly connected to the pour hole 115. The electrical connector 43 is connected to the communication hole 116, and one end of the electrical connector 43 is electrically connected to the electrode assembly 41, and the other end is electrically connected to a circuit board assembly outside the case 100.

Referring to fig. 8, an embodiment of the present application further provides a battery 300, where the battery 300 includes the battery cell 200 in any of the embodiments. The battery 300 further includes a circuit board assembly disposed outside the case 100, and the circuit board assembly is electrically connected to the electrode assembly 41. The circuit board assembly may be, but not limited to, a BMS (Battery Management System), and can implement module functions of data acquisition, control, protection, communication, power calculation, signal transmission, power transmission, and the like of the electrode assembly.

Referring to fig. 9, an electric device 400 is further provided in an embodiment of the present application, and the electric device 400 includes the battery 300 in any of the embodiments. The electric device 400 may be an electronic device such as a mobile phone or a tablet computer, or a mobile device such as an unmanned aerial vehicle or an electric vehicle. In some embodiments, the consumer has a battery compartment with rounded corners, to which the connecting wall 22 forms a transition surface extending in an arc-shaped plane between the bottom wall 21 and the side wall 11.

Among above-mentioned casing 100, electric core 200, battery 300 and consumer 400, first part 221 is the arc extension setting in first direction Z to make connecting wall 22 form the transition face that is the arcwall face and extends between diapire 21 and lateral wall 11, and then the adaptation of being convenient for has the battery compartment at fillet corner, improves casing 100's commonality. The second portion 222 abuts against the first step portion 111 to improve the connection strength between the first cover 20 and the frame 10.

In addition, other changes may be made by those skilled in the art within the spirit of the present application, and it is understood that such changes are encompassed within the scope of the present disclosure.

Claims

1. A shell comprises a frame body and a first cover body which are connected along a first direction, and is characterized in that the frame body comprises a side wall, the side wall is arranged in a surrounding mode and forms an accommodating space, a first step portion is arranged at one end, facing the first cover body, of the side wall, the first step portion is formed on one side, facing the accommodating space, of the side wall or on one side, facing away from the accommodating space, of the side wall,

the first lid includes diapire and connecting wall, follows the first direction, the diapire with the lateral wall interval sets up, just the projection of diapire is located in the accommodation space, the connecting wall includes first part and second part, the first part certainly the edge orientation of diapire first step portion extends the setting and is located outside the first step portion, the second part certainly first part extends to in the first step portion, first part is in be the arc and extends the setting in the first direction, the second part butt in first step portion.

2. The housing of claim 1, wherein a projection of the connecting wall is located in the accommodating space in the first direction.

3. The housing according to claim 1, wherein the first portion extends in the first direction as an arc of a circle having a radius R satisfying: r is more than or equal to 0.2mm.

4. The housing according to claim 1, wherein an angle β between the direction of extension of the second portion and the first direction satisfies: beta is more than or equal to 0 degree and less than or equal to 5 degrees.

5. The case according to claim 1, wherein the thicknesses of the bottom wall and the connecting wall are the same and are defined as a first thickness T1 of the first cover, and a relationship between the first thickness T1 of the first cover and a second thickness T2 of the side wall satisfies: t1 is less than T2.

6. The housing according to claim 5, wherein the step portion includes a first step face provided in the first direction, and a second step face provided in a thickness direction of the side wall, the first step face and the second step face being provided adjacently and forming a space accommodating the second portion.

7. The housing according to claim 6, wherein a relationship between the first length d1 of the first step face and the first thickness T1 of the first lid body in the thickness direction of the side wall satisfies: t1 is less than d1.

8. The housing according to claim 7, wherein a relationship between the first length d1 of the first step face and the second thickness T2 of the side wall in the thickness direction of the side wall satisfies: t2 is more than 0.15mm and less than 2mm, and d1 is more than or equal to 0.05mm and less than or equal to 0.5T2.

9. The housing according to claim 6, wherein, in the first direction, a relationship between a second length d2 of the second step face and a height h1 of the second portion satisfies: d2 is more than 0.2mm, and d2 is less than h1.

10. The housing of claim 1 wherein said side wall includes a plurality of wall portions and chamfered portions, said wall portions being circumferentially disposed, said chamfered portions being connected between adjacent ones of said wall portions, said chamfered portions extending arcuately when viewed in a first direction.

11. The housing of claim 1, further comprising a second cover sealingly attached to an end of the sidewall remote from the first cover.

12. A battery cell comprising an electrode assembly, wherein the battery cell further comprises a casing according to any of claims 1 to 11, and wherein the electrode assembly is disposed in the receiving space.

13. A battery comprising the cell of claim 12.

14. An electrical consumer, characterized in that the consumer comprises a battery according to claim 13.