Battery casing, battery, battery pack and electrical device

Abstract

A battery casing (100), a battery (1000), a battery pack, and an electrical device. The battery casing comprises: a casing body (10), a first cover plate (20) and a second cover plate (30). The casing body is annular and surrounds to form an accommodating cavity (11), and the accommodating cavity is provided with a first opening (12) and a second opening (13) opposite to each other, the first cover plate covering the first opening, and the second cover plate covering the second opening. An edge of at least one of the casing body, the first cover plate and the second cover plate forms a flange (40), the flange being located outside the accommodating cavity.

Description

Battery shell, battery, battery pack and electric device

[0001] Cross-reference to related applications

[0002] The present application is based on the Chinese patent application No. 202421934555.9 filed on August 9, 2024, and claims priority to the Chinese patent application No. 202421934555.9, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of batteries, and in particular to a battery shell, a battery, a battery pack and an electric device. BACKGROUND

[0004] In the prior art, the connection manufacturing process of the battery shell on the closed surface cannot achieve complete non- rounded corners, resulting in the presence of rounded corners at the corners of the battery shell. The setting of the rounded corners is easy to occupy the space of the accommodation cavity in the battery shell, resulting in that the space in the accommodation cavity cannot be fully utilized, and the size of the battery is increased. SUMMARY

[0005] The present disclosure aims to at least partially solve one of the technical problems in the related art.

[0006] To this end, one purpose of the present disclosure is to provide a battery shell capable of improving the space utilization of the accommodation cavity.

[0007] Another purpose of the present disclosure is to provide a battery having the above-mentioned battery shell.

[0008] Still another purpose of the present disclosure is to provide a battery pack having the above-mentioned battery.

[0009] Still another purpose of the present disclosure is to provide an electric device having the above-mentioned battery or battery pack.

[0010] According to the battery shell of the first aspect of the present disclosure, the edge of at least one of the shell body, the first cover plate and the second cover plate forms a flange, and the flange is located outside the accommodation cavity.

[0011] According to the battery shell of the present disclosure, the accommodation cavity can have a larger space at the corners, thereby improving the consistency of the shape of the accommodation cavity and the shape of the battery cell, enabling the corners of the battery cell to be accommodated at the corners of the accommodation cavity, improving the space utilization in the accommodation cavity, and being beneficial to the miniaturization of the overall battery or the thinning of the thickness of the battery.

[0012] Additional aspects and advantages of the present disclosure will be in part apparent and in part expressly stated in the description that follows. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is an exploded structural view of a battery shell according to an embodiment of the present disclosure;

[0014] Fig. 2 is a perspective structural view of the battery shell according to the embodiment shown in Fig. 1;

[0015] Fig. 3 is a structural view of a battery shell according to another embodiment of the present disclosure;

[0016] Fig. 4 is a partial structural view of the battery shell according to the embodiment of the present disclosure at the flange;

[0017] Fig. 5 is an enlarged structural view of the battery shell according to the embodiment of the present disclosure at the flange;

[0018] Fig. 6 is an enlarged structural view of the battery shell according to another embodiment of the present disclosure at the flange;

[0019] Fig. 7 is an enlarged structural view of the battery shell according to the embodiment of the present disclosure at the third connecting area;

[0020] Fig. 8 is an enlarged structural view of the battery shell according to another embodiment of the present disclosure at the third connecting area;

[0021] Fig. 9 is a structural view of a first cover plate according to the embodiment of the present disclosure;

[0022] Fig. 10 is a partial structural view of a battery according to the embodiment of the present disclosure at a battery terminal.

[0023] Reference signs: battery shell 100, shell body 10, accommodating cavity 11, first opening 12, second opening 13, second flange 14, main shell ring 15, outer circular arc segment 16, avoidance gap 17, first cover plate 20, main body plate 21, first flange 22, second cover plate 30, flange 40, fixing portion 41, lug 42, first connecting area 51, second connecting area 52, third connecting area 53, pressure relief valve 60, battery cell 200, tab 210, conductive terminal 300, insulating member 310, battery 1000. DETAILED DESCRIPTION

[0024] Embodiments of the present disclosure are described in detail below with reference to the attached drawings, which show by way of example embodiments in which like numerals indicate like elements or elements having the same or similar function throughout the several views. The embodiments described below are examples intended to explain the disclosure, and are not to be understood as limiting the disclosure.

[0025] A battery shell 100, a battery 1000, a battery pack, and an electric device according to embodiments of the present disclosure are described below with reference to the accompanying drawings.

[0026] As shown in FIGS. 1-3, the battery shell 100 according to embodiments of the present disclosure includes a shell body 10, a first cover plate 20, and a second cover plate 30. The shell body 10 is annular and surrounds a receiving cavity 11 having opposite first and second openings 12 and 13, the first cover plate 20 covers the first opening 12, and the second cover plate 30 covers the second opening 13. At least one of the shell body 10, the first cover plate 20, and the second cover plate 30 has an edge forming a flange 40 outside the receiving cavity 11.

[0027] It can be understood that the first cover plate 20 and the second cover plate 30 are directly covered on the shell body 10, so that there is no transition surface between the first cover plate 20 and the shell body 10, and between the second cover plate 30 and the shell body 10, thereby increasing the space of the receiving cavity 11 at the corners. That is, when the battery cell 200 is arranged in the receiving cavity 11, it can simultaneously contact the shell body 10, the first cover plate 20, and the second cover plate 30, thereby improving the space utilization of the receiving cavity 11.

[0028] It should be noted that the corners of the receiving cavity 11 are the space of the receiving cavity 11 at the connection position of the first cover plate 20 and the shell body 10, and the space of the receiving cavity 11 at the connection position of the second cover plate 30 and the shell body 10, that is, the corners of the receiving cavity 11 surround the first and second openings 12 and 13.

[0029] Therefore, the receiving cavity 11 can have more space at the corners, thereby improving the consistency of the shape of the receiving cavity 11 and the shape of the battery cell 200, allowing the corners of the battery cell 200 to be accommodated at the corners of the receiving cavity 11, improving the space utilization of the receiving cavity 11, and facilitating the miniaturization or thinning of the battery 1000 as a whole.

[0030] At the same time, the edge of at least one of the shell body 10, the first cover plate 20, and the second cover plate 30 is located outside the receiving cavity 11, reducing or avoiding the occupation of the space at the corners of the receiving cavity 11 by the flange 40, thereby increasing the space of the receiving cavity 11 at the corners and facilitating the flow of electrolyte at the corners of the receiving cavity 11.

[0031] Preferably, the included angle between the shell body 10 and the first cover plate 20 is 90 degrees, and the included angle between the shell body 10 and the second cover plate 30 is 90 degrees, so that the included angle of the accommodation cavity 11 at the corner is a right angle. It can be understood that for the square battery cell 200, the included angle of the battery cell 200 at the edge is a right angle, so that when the square battery cell 200 is arranged in the accommodation cavity 11, the shape of the accommodation cavity 11 can match the square battery cell 200, so that the edge of the square battery cell 200 can be accommodated at the corner of the accommodation cavity 11, so that the square battery 1000 can be fitted with the shell body 10, the first cover plate 20 and the second cover plate 30, the space utilization in the accommodation cavity 11 is improved, and the overall miniaturization of the battery 1000 or the thickness of the battery 1000 is further improved.

[0032] In the present disclosure, the annular shape of the shell body 10 is not limited, and the shapes of the first cover plate 20 and the second cover plate 30 are arranged corresponding to the annular shape of the shell body 10. For example, the shell body 10 can surround a square, L-shaped or the like structure.

[0033] Preferably, the thickness of the shell body 10 is greater than or equal to 75um, and the thickness of the first cover plate 20 and the second cover plate 30 is greater than or equal to 20um.

[0034] In some embodiments, the shell body 10 includes an outer circular arc segment 16, the outer circular arc segment 16 is bent towards the side away from the accommodation cavity 11, the outer circular arc segment 16 surrounds the first opening 12 or the second opening 13, and the flange 40 is connected to the outer circular arc segment 16. Wherein, the outer circular arc segment 16 and the first cover plate 20 or the second cover plate 30 form an avoidance gap 17.

[0035] It should be noted that the avoidance gap 17 communicates with the accommodation cavity 11.

[0036] Therefore, the avoidance gap 17 can form a space protruding away from the accommodation cavity 11 at the corner of the accommodation cavity 11, so as to increase the space at the corner of the accommodation cavity 11, further improve the space utilization of the accommodation cavity 11, and facilitate the flow of electrolyte at the corner of the accommodation cavity 11.

[0037] In some embodiments, as shown in FIG. 4, at least one of the first cover plate 20 and the second cover plate 30 includes a main plate 21 and a first flange 22 located at the edge of the main plate 21. The shell body 10 includes a main shell ring 15 and a second flange 14 located at the edge of the main shell ring 15, and the second flange 14 is arranged corresponding to the first flange 22. The main plate 21 is arranged on one side of the main shell ring 15, and the first flange 22 and the second flange 14 are stacked and connected to form the flange 40.

[0038] It should be noted that in specific embodiments, the first cover plate 20 can include the main plate 21 and the first flange 22, the second cover plate 30 can also include the main plate 21 and the first flange 22, or the first cover plate 20 and the second cover plate 30 can both include the main plate 21 and the first flange 22, and in this case, the shell body 10 includes two second flanges 14, which correspond to the first flanges 22 of the first cover plate 20 and the second cover plate 30. For the convenience of description, the following description takes the first cover plate 20 including the main plate 21 and the first flange 22 as an example, and the corresponding embodiment shown in the drawings is also the first cover plate 20 including the main plate 21 and the first flange 22.

[0039] Thus, the main plate 21 and the main shell ring 15 enclose the accommodation cavity 11, the second flange 14 surrounds the main shell ring 15, and the first flange 22 is located at the edge of the main plate 21, so that the flange 40 formed by the first flange 22 and the second flange 14 is located outside the accommodation cavity 11, and the fixing part 41 on the flange 40 can be spaced apart from the accommodation cavity 11.

[0040] Further, as shown in FIGS. 4-6, the first flange 22 is located in the same plane as the main plate 21, and the second flange 14 and the main shell ring 15 are connected by the outer circular arc segment 16.

[0041] Thus, without occupying the space in the accommodation cavity 11, the force transmission between the second flange 14 and the main shell ring 15 can be more uniform, the connection strength between the second flange 14 and the main shell ring 15 can be improved, the structural stability of the shell body 10 can be improved, and the risk of fracture between the main shell ring 15 and the second flange 14 can be reduced or avoided.

[0042] At the same time, since the flange 40 is located outside the accommodation cavity 11, that is, the first flange 22 and the second flange 14 are both located on the side of the main shell ring 15 away from the accommodation cavity 11, that is, the transition between the second flange 14 and the main shell ring 15 does not occupy the space in the accommodation cavity 11.

[0043] Thus, the outer circular arc segment 16 and the main plate 21 or the first flange 22 form an avoidance gap 17, the avoidance gap 17 surrounds the second opening 13 and communicates with the accommodation cavity 11. The avoidance gap 17 can form a space protruding away from the accommodation cavity 11 at the corner of the accommodation cavity 11, thereby increasing the space of the accommodation cavity 11 at the corner, further improving the space utilization of the accommodation cavity 11, and facilitating the flow of electrolyte at the corner of the accommodation cavity 11.

[0044] In some embodiments, as shown in FIGS. 5 and 6, a first connection area 51 formed by a welding pool is provided between the first flange 22 and the second flange 14, and the first connection area 51 is arranged around the main plate 21.

[0045] Thus, the first flange 22 and the second flange 14 are connected at the first connecting area 51 to realize the connection between the first cover plate 20 and the shell body 10. And the first connecting area 51 surrounds the main plate 21, that is, the first connecting area 51 surrounds the first opening 12, so as to improve the sealing performance of the first cover plate 20 covering the first opening 12 and improve the connection firmness between the first cover plate 20 and the shell body 10.

[0046] In the present disclosure, the way of forming the welding pool between the first flange 22 and the second flange 14 is not limited, and the way of forming the welding pool can be selected according to the materials of the first cover plate 20, the second cover plate 30 and the shell body 10. For example, by means of sonic welding, hot melting or laser welding, etc. Among them, when the first cover plate 20, the second cover plate 30 and the shell body 10 are plastic parts, the hot melting method can be used to form the welding pool.

[0047] Further, as shown in FIG. 6, the thickness of the first flange 22 is greater than the thickness of the second flange 14, and the first connecting area 51 extends from the surface of the second flange 14 away from the first flange 22 to the inside of the first flange 22. Or, as shown in FIG. 5, the thickness of the first flange 22 is less than the thickness of the second flange 14, and the first connecting area 51 extends from the surface of the first flange 22 away from the second flange 14 to the inside of the second flange 14.

[0048] Thus, it can be ensured that the first connecting area 51 can penetrate the first flange 22 or the second flange 14, while reducing the difficulty of forming the first connecting area 51, and improving the firmness and reliability of the connection between the first flange 22 and the second flange 14 at the first connecting area 51.

[0049] In some embodiments, as shown in FIGS. 4-6, the first flange 22 and the second flange 14 are completely attached. Thus, the stress uniformity between the first flange 22 and the second flange 14 can be improved, and the overall structural strength and structural stability of the flange 40 can be improved.

[0050] At the same time, the setting position of the first cover plate 20 in the first opening 12 can be limited, and the installation operation of the first cover plate 20 covering the first opening 12 is facilitated. By aligning the edges of the first flange 22 and the second flange 14, the first cover plate 20 can be placed in the correct position covering the first opening 12.

[0051] In some embodiments, as shown in FIGS. 2-6, the flange 40 is provided with a fixing portion 41 for fixing. In this way, the battery case 100 is fixed by the fixing portion 41, which can facilitate the fixing operation of the battery case 100, and the fixing portion 41 is located at the flange 40 and spaced from the accommodation cavity 11, which can reduce or avoid the external force at the fixing portion 41 being transmitted to the inside of the accommodation cavity 11, improve the stability of the structure inside the accommodation cavity 11, and improve the reliability and safety of the battery 1000.

[0052] In addition, when the first flange 22 and the second flange 14 are completely attached, the first flange 22 and the second flange 14 jointly form the flange 40, and when the battery case 100 is fixed by the fixing portion 41, the stress at the fixing portion 41 can be simultaneously transmitted to the first flange 22 and the second flange 14, thereby improving the structural stability of the flange 40 and improving the reliability and stability of the battery case 100 when fixed by the flange 40.

[0053] Preferably, the fixing portion 41 is used for detachable fixing and mounting of the battery case 100, for example, the battery case 100 is detachably mounted on the vehicle by the fixing portion 41, so as to facilitate the replacement operation of the battery 1000.

[0054] In the present disclosure, the manner in which the battery case 100 is fixed by the fixing portion 41 is not limited.

[0055] Further, as shown in FIGS. 5 and 6, the fixing portion 41 is simultaneously provided on the first flange 22 and the second flange 14, and the first connecting area 51 is located on one side of the fixing portion 41 adjacent to the main plate 21. The second connecting area 52 formed by the welding pool is provided between the first flange 22 and the second flange 14, and the second connecting area 52 is located on the side of the fixing portion 41 away from the main plate 21.

[0056] In this way, the first flange 22 and the second flange 14 are simultaneously connected at different positions by the first connecting area 51 and the second connecting area 52, which can improve the connection reliability and stability between the first flange 22 and the second flange 14.

[0057] At the same time, the first connecting area 51 and the second connecting area 52 are respectively located on both sides of the fixing portion 41, which can improve the structural strength of the flange 40 at the fixing portion 41, thereby improving the stability and reliability of the battery case 100 when fixed by the fixing portion 41.

[0058] In some embodiments, as shown in FIG. 1, FIG. 2, FIG. 5 and FIG. 6, the fixing portion 41 comprises a plurality of fixing holes, the fixing holes are arranged through the thickness direction of the flange 40, and the fixing holes are arranged at intervals in the circumferential direction of the shell body 10. In this way, the fixing holes can be used for fixing the battery shell 100, so that the battery shell 100 can be fixed in the circumferential direction of the shell body 10 through the fixing holes, and the stability of the fixing of the battery shell 100 is improved. And it is convenient to realize detachable connection in the fixing hole, so as to simplify the dismounting operation of replacing the battery 1000.

[0059] At the same time, when the battery shell 100 is fixed in the fixing hole, the first flange 22 and the second flange 14 can be fixed at the same time, and the stability of the connection between the first flange 22 and the second flange 14 is further improved.

[0060] Further, as shown in FIG. 1 and FIG. 2, the flange 40 comprises a plurality of lugs 42, the lugs 42 are arranged at intervals in the circumferential direction of the shell body 10, and the fixing holes are arranged in the lugs 42. In this way, a vacant space can be formed between the adjacent fixing holes in the circumferential direction of the shell body 10, which can reduce or avoid the installation of the battery shell 100 being blocked by the flange 40, thereby improving the space requirement when the battery shell 100 is fixed and installed through the fixing portion 41, improving the universality of the battery shell 100, and reducing the installation difficulty.

[0061] In some embodiments, as shown in FIG. 4, FIG. 7 and FIG. 8, the flange 40 is located at the edge of the first cover plate 20. The edge of the second cover plate 30 coincides with the edge of the shell body 10, and a third connecting area 53 formed by a welding pool is arranged between the two, and the third connecting area 53 is arranged around the second opening 13.

[0062] In this way, the second cover plate 30 and the shell body 10 are connected through the third connecting area 53, and the third connecting area 53 surrounds the second opening 13, so that the sealing connection between the second cover plate 30 and the shell body 10 around the second opening 13 can be realized, thereby improving the sealing performance of the accommodating cavity 11.

[0063] In the present disclosure, the way of forming the welding pool between the second cover plate 30 and the shell body 10 is not limited, and the way of forming the welding pool can be selected according to the materials of the second cover plate 30 and the shell body 10. For example, through ultrasonic welding, hot melting or laser welding and the like. When the second cover plate 30 and the shell body 10 are plastic parts, the hot melting method can be used to form the welding pool.

[0064] It should be noted that in other embodiments (not shown in the drawings), the flange 40 can also be located at the edge of the second cover plate 30, the edge of the first cover plate 20 coincides with the edge of the shell body 10, and a third connecting area 53 formed by a welding pool is arranged between the two, and the third connecting area 53 is arranged around the first opening 12.

[0065] Further, the third connecting region 53 extends from the surface of the second cover plate 30 away from the first cover plate 20 to the inside of the shell body 10. Alternatively, the third connecting region 53 extends from the corner of the edge of the second cover plate 30 to the inside of the shell body 10.

[0066] In this way, the third connecting region 53 can extend to both the second cover plate 30 and the shell body 10, which reduces the difficulty of forming the third connecting region 53 and improves the firmness and reliability of the connection between the second cover plate 30 and the shell body 10.

[0067] It should be noted that the position of the third connecting region 53 on the second cover plate 30 can be set according to the position of the edge of the second cover plate 30 relative to the edge of the shell body 10. For example, in the example of FIG. 7, the edge of the second cover plate 30 completely coincides with the edge of the shell body 10, and in this case, the third connecting region 53 extends from the surface of the second cover plate 30 away from the first cover plate 20 to the inside of the shell body 10. For another example, in the example of FIG. 8, the edge of the second cover plate 30 overlaps a portion of the edge of the shell body 10 in the thickness direction, and in this case, the third connecting region 53 extends from the corner of the edge of the second cover plate 30 to the inside of the shell body 10.

[0068] In some embodiments, at least one of the first cover plate 20 and the second cover plate 30 is provided with a pressure relief valve 60. In the example of FIG. 9, the first cover plate 20 is provided with one pressure relief valve 60.

[0069] In this way, when the air pressure in the accommodation cavity 11 is too high, the pressure relief valve 60 can be directionally blasted and release the air pressure, thereby reducing or avoiding the risk of explosion of the battery shell 100 and improving the safety of the battery 1000.

[0070] In the present disclosure, the forming method of the pressure relief valve 60 is not limited. For example, the pressure relief valve 60 is formed on the first cover plate 20 or the second cover plate 30 by heat melting, extrusion or laser engraving.

[0071] In some embodiments, the shell body 10 is a punched part or an extruded part, thereby facilitating the manufacture of the shell body 10 and reducing the manufacturing cost of the shell body 10.

[0072] As shown in FIG. 10, the battery 1000 according to an embodiment of the present disclosure includes the battery shell 100, the battery cell 200 and the conductive terminal 300 of the above-described embodiments. The battery cell 200 is arranged in the accommodation cavity 11, and the conductive terminal 300 is arranged through the shell body 10 and connected with the tab 210 of the battery cell 200.

[0073] The battery 1000 of the present disclosure, by employing the battery shell 100 of the above-mentioned embodiments, the accommodation cavity 11 can have a larger space at the corners, thereby improving the consistency of the shape of the accommodation cavity 11 and the shape of the battery cell 200, enabling the corners of the battery cell 200 to be accommodated at the corners of the accommodation cavity 11, improving the space utilization rate in the accommodation cavity 11, and facilitating the miniaturization of the overall battery 1000 or the thinning of the thickness of the battery 1000.

[0074] In some embodiments, the battery shell 100 is an electrically conductive member, one of the tabs 210 of the battery cell 200 is connected to the battery shell 100, and the other tab 210 is connected to the electrically conductive terminal 300, and the electrically conductive terminal 300 is clamped between the battery shell 100 and the insulating member 310.

[0075] Therefore, the insulating member 310 can separate the electrically conductive terminal 300 and the battery shell 100, reduce or avoid the risk of short circuit between the electrically conductive terminal 300 and the battery shell 100, and reduce the number of electrically conductive terminals 300, thereby saving space for the electrically conductive terminal 300 and facilitating the reduction of the volume of the battery 1000.

[0076] In the present disclosure, the formation method of the insulating member 310 is not limited. For example, the insulating member 310 can be an independent device and is clamped between the electrically conductive terminal 300 and the battery shell 100. For another example, the insulating member 310 is an injection molded member, which is directly injection molded between the electrically conductive terminal 300 and the battery shell 100.

[0077] The battery pack according to the embodiments of the present disclosure comprises at least two batteries of the above-mentioned embodiments.

[0078] The battery pack of the present disclosure, by employing the battery 1000 of the above-mentioned embodiments, can improve the space utilization rate of the accommodation cavity 11 of the battery 1000, facilitate the miniaturization of the overall battery 1000 or the thinning of the thickness of the battery 1000, and reduce the volume of the battery pack.

[0079] The electric device according to the embodiments of the present disclosure comprises the battery 1000 of the above-mentioned embodiments or the battery pack of the above-mentioned embodiments.

[0080] The electric device of the present disclosure, by employing the battery 1000 of the above-mentioned embodiments, can improve the space utilization rate of the accommodation cavity 11 of the battery 1000, facilitate the miniaturization of the overall battery 1000 or the thinning of the thickness of the battery 1000, and reduce the space occupied by the battery 1000 in the electric device.

[0081] In the present disclosure, the type of the electric device is not limited. For example, the electric device is a vehicle.

[0082] Other configurations and operations of the battery housing 100, the battery 1000, the battery pack, and the power consuming device according to the embodiments of the present disclosure are known to those skilled in the art, and will not be described in detail herein.

[0083] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present specification, the exemplary 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 suitable manner in one or more embodiments or examples.

[0084] Although the embodiments of the present disclosure have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present disclosure, and the scope of the present disclosure is defined by the claims and their equivalents.

Claims

1. A battery housing (100), wherein, The shell body (10) is annular and surrounds a containing cavity (11) having opposite first and second openings (12, 13). A first cover plate (20) covers the first opening (12). A second cover plate (30) covers the second opening (13). An edge of at least one of the shell body (10), the first cover plate (20) and the second cover plate (30) forms a flange (40) located outside the containing cavity (11). The shell body (10) comprises an outer circular arc segment (16) bent towards a side away from the containing cavity (11), the outer circular arc segment (16) surrounds the first opening (12) or the second opening (13), and the flange (40) is connected to the outer circular arc segment (16).

2. The battery housing (100) of claim 1, wherein, The outer circular arc segment (16) and the first cover plate (20) or the second cover plate (30) form an avoiding gap (17). At least one of the first cover plate (20) and the second cover plate (30) comprises a main plate (21) and a first flange (22) located at an edge of the main plate (21).

3. The battery housing (100) according to any one of claims 1 or 2, wherein, The shell body (10) comprises a main shell ring (15) and a second flange (14) located at an edge of the main shell ring (15), the second flange (14) is arranged corresponding to the first flange (22). The main plate (21) covers one side of the main shell ring (15), and the first flange (22) and the second flange (14) are connected in layers to form the flange (40). The first flange (22) and the main plate (21) are located in the same plane, and the second flange (14) and the main shell ring (15) are connected through an outer circular arc segment (16).

4. The battery housing (100) of claim 3, wherein, The outer circular arc segment (16) and the main plate (21) or the first flange (22) form an avoiding gap (17) communicating with the containing cavity (11). A first connecting area (51) formed by a welding pool is arranged between the first flange (22) and the second flange (14), and the first connecting area (51) surrounds the main plate (21).

5. The battery housing (100) according to any one of claims 3 or 4, wherein, The thickness of the first flange (22) is greater than the thickness of the second flange (14), and the first connecting area (51) extends from a surface of the second flange (14) away from the first flange (22) to the inside of the first flange (22).

6. The battery housing (100) of claim 5, wherein, Alternatively, the thickness of the first flange (22) is less than the thickness of the second flange (14), and the first connecting area (51) extends from a surface of the first flange (22) away from the second flange (14) to the inside of the second flange (14). The first flange (22) and the second flange (14) are completely attached.

7. The battery housing (100) according to any one of claims 3-6, wherein, The flange (40) is provided with a fixing portion (41) for fixing.

8. The battery housing (100) according to any one of claims 5-6, wherein, The fixing portion (41) is arranged on the first flange (22) and the second flange (14).

9. The battery housing (100) according to any one of claim 8, wherein, ​ The first connecting area (51) is located on one side of the fixing part (41) adjacent to the main plate (21); The first flange (22) and the second flange (14) are provided with a second connecting area (52) formed by a welding pool, and the second connecting area (52) is located on the side of the fixing part (41) away from the main plate (21).

10. The battery housing (100) according to any one of claims 8 or 9, wherein, The fixing part (41) comprises a plurality of fixing holes penetrating in the thickness direction of the flange (40), and the plurality of fixing holes are arranged at intervals in the circumferential direction of the shell body (10).

11. The battery housing (100) of claim 10, wherein, The flange (40) comprises a plurality of lugs (42) arranged at intervals in the circumferential direction of the shell body (10), and the fixing holes are arranged on the lugs (42).

12. The battery housing (100) according to any one of claims 1-11, wherein, The flange (40) is located at the edge of the first cover plate (20); The edge of the second cover plate (30) coincides with the edge of the shell body (10), and a third connecting area (53) formed by a welding pool is arranged therebetween, and the third connecting area (53) is arranged around the second opening (13).

13. The battery housing (100) of claim 12, wherein, The third connecting area (53) extends from the surface of the second cover plate (30) away from the first cover plate (20) to the inside of the shell body (10). Alternatively, the third connecting area (53) extends from the corner of the edge of the second cover plate (30) to the inside of the shell body (10).

14. The battery housing (100) according to any one of claims 1-13, wherein, At least one of the first cover plate (20) and the second cover plate (30) is provided with a pressure relief valve (60).

15. The battery housing (100) according to any one of claims 1-14, wherein, The shell body (10) is a punched part or an extruded part.

16. A battery (1000), wherein Comprise: The battery shell (100) according to any one of claims 1-15; The electric core (200) is arranged in the accommodating cavity (11); The conductive terminal (300) is arranged in the shell body (10) and connected with the tab (210) of the electric core (200).

17. The battery (1000) according to claim 16, wherein The battery shell (100) is a conductive part, one tab (210) of the electric core (200) is connected with the battery shell (100), and the other tab (210) is connected with the conductive terminal (300), and an insulating part (310) is arranged between the conductive terminal (300) and the battery shell (100).

18. A battery pack, wherein, Comprise at least two batteries (1000) according to any one of claims 16-17.

19. An electrical device, comprising: Comprise the battery (1000) according to any one of claims 16-17, or comprise the battery pack according to claim 18.

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