Shell assembly, battery and energy storage equipment

Abstract

The invention provides a shell assembly, a battery and energy storage equipment, the shell assembly comprises a shell main body and at least one cover body, the shell main body is provided with an accommodating cavity, the shell main body is provided with two first end parts which are oppositely arranged, at least one first end part is provided with a mounting hole in a penetrating manner, the mounting hole is communicated with the accommodating cavity, and the cover body is arranged in the accommodating cavity; the cover body comprises a cover main body and an insertion part convexly arranged on the cover main body, the insertion part is inserted into the corresponding mounting hole, the inner side wall of the mounting hole comprises a first side wall section connected with the first end part, and the first side wall section is gradually shrunk in the direction from the mounting hole to the accommodating cavity; and / or the side wall of the insertion part comprises a second side wall section far away from the cover main body, the second side wall section is gradually shrunk in the direction far away from the cover main body, and the first side wall section and / or the second side wall section which are / is gradually shrunk reduce the risk of generating metal wires or metal scraps in the mounting process of the cover body and the shell main body, so that the short circuit of the battery in the use process is avoided, and the service life of the battery is prolonged. And the insertion part can be prevented from extruding the mounting hole, the yield of the shell is improved, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to a housing assembly, a battery and an energy storage device. Background Art

[0002] When the shell body and the cover body of the shell assembly are assembled together, the insertion part of the cover body is usually inserted into the mounting hole of the shell body. However, during the assembly process, the insertion part is prone to scratching or even squeezing the mounting hole. When the insertion part scratches the mounting hole, it is easy to produce metal debris or even metal wires, increasing the risk of short circuit during battery use; when the insertion part squeezes the mounting hole, it is easy to cause deformation of the shell, resulting in a decrease in the yield rate and an increase in cost. Summary of the invention

[0003] Embodiments of the present invention provide a shell assembly, a battery, and an energy storage device, which aim to solve the problem in the related art that during the transfer process between the shell body and the cover body, the insertion portion is easily scratched or even squeezed against the mounting hole, thereby increasing the risk of short circuit during battery use and the shell deformation leading to reduced yield and increased cost.

[0004] In a first aspect, an embodiment of the present invention provides a housing assembly.

[0005] In one embodiment, the housing assembly comprises:

[0006] A shell body is formed with a cavity, the cavity is used for installing the electrode assembly, the shell body has two first ends arranged opposite to each other along a first direction, at least one of the first ends is penetrated by a mounting hole along the first direction, and the mounting hole is connected to the cavity;

[0007] At least one cover body is arranged in one-to-one correspondence with the mounting holes, the cover body comprises a cover body and an insertion portion protruding from the cover body, the cover body is used to close the mounting holes, and the insertion portion is inserted into the corresponding mounting hole; wherein,

[0008] The inner side wall of the mounting hole comprises a first side wall section connected to the first end, and the first side wall section is gradually arranged from the inner side wall of the shell body to the axial direction of the shell body along the direction from the mounting hole to the cavity; and / or,

[0009] The side wall of the insertion portion includes a second side wall section away from the cover body, and the second side wall section is gradually arranged from the inner side wall of the shell body to the axial direction of the shell body in a direction away from the cover body.

[0010] In one embodiment, the shell body further comprises a first side portion connecting the two first end portions, and the wall thickness of the first side portion is δ;

[0011] Along the first direction, the orthographic projection of the first side wall segment is a first ring body, and along the wall thickness direction of the first side portion, the thickness of the first ring body is H1, wherein 0.2δ≤H1≤0.8δ.

[0012] In one embodiment, the first side wall section is at least partially configured as a first inclined surface and / or the first side wall section is at least partially configured as a first curved surface.

[0013] In one embodiment, the shell body further comprises a first side portion connecting the two first end portions, and the wall thickness of the first side portion is δ;

[0014] Along the first direction, the orthographic projection of the second side wall segment is a second ring body, and along the wall thickness direction of the first side portion, the thickness of the second ring body is H2, wherein 0.4δ≤H2≤1.6δ.

[0015] In one embodiment, the second side wall section is at least partially configured as a second inclined surface and / or the second side wall section is at least partially configured as a second curved surface.

[0016] In a second aspect, an embodiment of the present invention provides a battery.

[0017] In one embodiment, the battery comprises:

[0018] The housing assembly as described above;

[0019] The electrode assembly is installed in the cavity.

[0020] In one embodiment, the electrode assembly has a second end portion arranged corresponding to the mounting hole and a second side portion connected to the second end portion, and the second end portion has a welding area and a non-welding area surrounding the welding area;

[0021] The battery further includes a first insulating member, a portion of which is used to abut against the non-welding area, and another portion of which is used to wrap at least a portion of the side portion to insulate and isolate the case body from the electrode assembly.

[0022] In one embodiment, both of the first end portions are provided with the mounting hole;

[0023] Two second end portions are provided, and the second side portion includes two first end side surfaces spaced apart along the first direction, and the two first end side surfaces are respectively connected to the two second end portions;

[0024] The first insulating member includes two insulating covers, which are spaced apart along the first direction, and each of the insulating covers includes an end insulating portion and a side insulating portion connected to each other, the end insulating portion is in contact with the non-welding area, and the side insulating portion is arranged to wrap around the end side surface.

[0025] In one embodiment, a second insulating member is further included. The second insulating member is disposed corresponding to the cover body, and the second insulating member is insulated and connected between the corresponding cover body and the second end portion.

[0026] In one embodiment, along the first direction, the orthographic projection of the second insulating member at the second end is within the non-welding area, and the second insulating member is used to press and fix the portion of the first insulating member attached to the non-welding area.

[0027] In one embodiment, a gap is provided between the second insulating member and the inner side wall of the shell body; and / or,

[0028] At least one of the covers is connected and fixed to the shell body, and the second insulating member is used to abut between the corresponding cover and the electrode assembly.

[0029] In one embodiment, the cover body is provided with a first through hole along the first direction, and the second insulating member is provided with a second through hole along the first direction, and the second through hole corresponds to the first through hole;

[0030] The battery assembly also includes a connecting assembly, which is arranged corresponding to the cover body, and includes a connecting piece and a pole, the connecting piece is welded and fixed to the welding area, and one end of the pole passes through the first penetration hole and the second penetration hole in sequence to be electrically connected to the connecting piece.

[0031] In one embodiment, the second insulating member includes an insulating body and a blocking portion protruding from the insulating body, wherein the blocking portion is extended along the circumference of the insulating body, so that the insulating body and the blocking portion are suitable for surrounding and forming a receiving groove;

[0032] The connecting member is installed in the accommodating groove.

[0033] In one embodiment, the enclosure portion has a second end side surface away from the insulating body and away from the accommodating groove, and the second end side surface is arranged to be tapered from the inner side wall of the shell body toward the axial direction of the shell body along a direction away from the insulating body.

[0034] In one embodiment, at least a portion of the second end side surface is configured as a third inclined surface and / or at least a portion of the second end side surface is configured as a third curved surface.

[0035] In one embodiment, the second insulating member further includes a pressing portion protruding from the second side, the pressing portion is located in the accommodating groove, and the pressing portion is used to press the connecting member against the welding area.

[0036] In a third aspect, an embodiment of the present invention provides an energy storage device.

[0037] In one embodiment, the energy storage device includes a battery as described above.

[0038] Beneficial effects of the embodiments of the present invention:

[0039] In an embodiment of the present invention, when the first side wall segment connected to the first end is tapered from the inner side wall of the shell body to the axial direction of the shell body along the direction from the mounting hole to the cavity, the contact area is increased when the insertion portion contacts the first side wall segment, avoiding the stress between the insertion portion and the first side wall segment from being concentrated at one point, reducing the sharpness of the edges of the shell body, reducing the risk of metal wires or metal debris generated during the installation of the cover body and the shell body, and avoiding the short circuit of the battery during use due to the presence of metal wires or metal debris. At the same time, the tapered first side wall segment also has a guiding function, which can alleviate the problem of squeezing the mounting hole due to tolerance or tooling positioning error when assembling the cover body and the shell body, making the assembly of the cover body and the shell body smoother, improving the shell yield rate, and reducing costs. When the second side wall section away from the cover body is gradually set from the inner side wall of the shell body to the axial direction of the shell body in the direction away from the cover body, the contact area between the second side wall section and the mounting hole is increased when inserted into the mounting hole, avoiding the stress between the second side wall section and the side wall of the mounting hole from being concentrated at one point, reducing the sharpness of the edge of the side wall of the insertion portion, reducing the risk of metal wire or metal debris generated during the installation of the cover body and the shell body, and avoiding the short circuit of the battery during use due to the presence of metal wire or metal debris. At the same time, the second side wall section with a gradually reduced setting also has a guiding function, which can alleviate the problem of squeezing the mounting hole due to tolerance or tooling positioning error when assembling the cover body and the shell body, making the assembly of the cover body and the shell body smoother, improving the shell yield rate, and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 is an exploded schematic diagram of a housing assembly provided by an embodiment of the present invention;

[0042] Figure 2yes Figure 1 A schematic cross-sectional view of the cover body shown;

[0043] Figure 3 is a schematic structural diagram of a battery provided by an embodiment of the present invention;

[0044] Figure 4 yes Figure 3 A schematic cross-sectional view of a battery shown;

[0045] Figure 5 yes Figure 4 A local enlarged schematic diagram of point A;

[0046] Figure 6 yes Figure 4 A local enlarged schematic diagram of point B;

[0047] Figure 7 yes Figure 3 A schematic structural diagram of a second insulating member shown;

[0048] Figure 8 yes Figure 7 A schematic front view of the second insulating member shown;

[0049] Fig. 9 yes Figure 3 Schematic diagram of the structure of the electrode assembly shown.

[0050] Description of reference numerals:

[0051] 1000. Battery;

[0052] 100, housing assembly, 110, housing body, 111, cavity, 112, first end, 1121, mounting hole, 11211, first side wall segment, 113, first side portion, 120, cover body, 121, cover body, 122, insertion portion, 1221, second side wall segment, 123, first through hole;

[0053] 200, electrode assembly, 210, second end portion, 211, welding region, 212, non-welding region, 220, second side portion, 221, first end side surface;

[0054] 310, insulating cover, 311, end insulating portion, 312, side insulating portion;

[0055] 400, second insulating member, 410, second penetration hole, 420, insulating body, 430, blocking portion, 431, second end side surface, 440, receiving groove, 450, pressing portion;

[0056] 500, gap;

[0057] 610, connector, 620, pole. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device.

[0059] When the shell body and the cover body of the shell assembly are assembled together, the insertion part of the cover body is usually inserted into the mounting hole of the shell body. However, during the assembly process, the insertion part is prone to scratching or even squeezing the mounting hole. When the insertion part scratches the mounting hole, it is easy to produce metal debris or even metal wires, increasing the risk of short circuit during battery use; when the insertion part squeezes the mounting hole, it is easy to cause deformation of the shell, resulting in a decrease in the yield rate and an increase in cost.

[0060] In view of this, the present invention proposes a housing assembly. Figure 1 and Figure 2 A schematic structural diagram of an embodiment of a housing assembly provided by the present invention, Figures 3 to 9 The schematic diagram of the structure of the battery embodiment provided by the present invention. The shell assembly 100 provided by the present invention can avoid the problem of the insertion part scratching or even squeezing the mounting hole during the transfer process between the shell body and the cover body, reduce the risk of short circuit during the use of the battery, improve the shell yield, and reduce costs. The shell assembly 100 will be described in detail in conjunction with the main drawings.

[0061] Reference Figure 1 and Figure 2 The housing assembly 100 includes a housing body 110 and at least one cover body 120 .

[0062] The shell body 110 is formed with a cavity 111, and the cavity 111 is used for installing the electrode assembly 200. This design ensures that the electrode assembly 200 can be firmly installed in the shell body 110, avoiding damage caused by external impact or vibration. The shell body 110 has two first ends 112 arranged opposite to each other along a first direction, and at least one of the first ends 112 is penetrated by a mounting hole 1121 along the first direction, and the mounting hole 1121 is connected to the cavity 111. In this way, the electrode assembly 200 can be easily installed in the cavity 111 through the mounting hole 1121, which simplifies the installation of the electrode assembly 200 and provides convenience for the installation of the electrode assembly 200.

[0063] In addition, in some embodiments, one first end portion 112 may be provided with a mounting hole 1121, or both first end portions 112 may be provided with mounting holes 1121. Specifically, the number of first end portions 112 provided with mounting holes 1121 may be set as required, and the present application does not limit this. In addition, the shell body 110 may have a variety of shapes, for example, the shell body 110 may be in a cylindrical or rectangular shape, etc., and the present application does not limit this.

[0064] Reference Figure 3 and Figure 4 At least one cover 120 is provided corresponding to the mounting hole 1121. The cover 120 includes a cover body 121 and an insertion portion 122 protruding from the cover body 121. The cover body 121 is used to close the mounting hole 1121. The insertion portion 122 is inserted into the corresponding mounting hole 1121. In this way, it is possible to prevent external dust, moisture, humidity and other pollutants from entering the shell body 110 through the mounting hole 1121 and causing damage to the electrode assembly 200 or other sensitive components inside. The insertion portion 122 is protruding from the cover body 121 and inserted into the corresponding mounting hole 1121, making the installation process of the shell body 110 and the cover 120 more intuitive and simple. The user only needs to align the insertion portion 122 of the cover 120 with the mounting hole 1121 and insert it, without the need for complex positioning, thereby reducing the difficulty of installation.

[0065] It should be noted that after the cover body 120 and the shell body 110 are installed, the sealing of the connection between the cover body 120 and the shell body 110 can be achieved by sealing means (such as sealing rings, sealants, etc.) to ensure the sealing of the cavity 111 and prevent external contaminants such as dust and moisture from entering the shell body 110 and causing damage to the electrode assembly 200.

[0066] Specifically, the number of covers 120 can be set as needed. For example, when one mounting hole 1121 is provided, one cover 120 is provided accordingly. When two mounting holes 1121 are provided, two covers 120 are provided accordingly. The present application does not limit the number of covers 120.

[0067] Reference Figure 5 and Figure 6 The inner side wall of the mounting hole 1121 includes a first side wall section 11211 connected to the first end portion 112 , and the first side wall section 11211 is gradually arranged from the inner side wall of the shell body 110 to the axial direction of the shell body 110 along the direction from the mounting hole 1121 to the cavity 111 .

[0068] It should be noted that the tapered setting here means that the cross-sectional area of ​​the hole segment formed by the first side wall segment 11211 in the first direction is gradually reduced along the direction from the mounting hole 1121 to the cavity 111 .

[0069] It should be noted that the cross-section of the mounting hole 1121 has various shapes, for example, the cross-section of the mounting hole 1121 can be circular, rectangular, square or elliptical, etc. Specifically, the specific shape of the mounting hole 1121 can be set as needed, and this application does not limit this.

[0070] Reference Figure 5 and Figure 6 The side wall of the insertion portion 122 includes a second side wall segment 1221 away from the cover body 121 , and the second side wall segment 1221 is gradually arranged from the inner side wall of the shell body 110 to the axial direction of the shell body 110 in a direction away from the cover body 121 .

[0071] It should be noted that the tapered setting here means that the cross-sectional area of ​​the plug-in section of the plug-in portion corresponding to the second side wall section 1221 in the first direction is gradually reduced in the direction away from the cover body 121 .

[0072] In the embodiment of the present invention, when the first side wall section 11211 connected to the first end 112 is gradually set from the inner side wall of the shell body 110 to the axial direction of the shell body 110 along the direction from the mounting hole 1121 to the cavity 111, the contact area is increased when the insertion portion 122 contacts the first side wall section 11211, so as to avoid the stress between the insertion portion 122 and the first side wall section 11211 being concentrated at one point, reduce the sharpness of the edge of the shell body 110, reduce the risk of metal wire or metal debris generated during the installation of the cover body 120 and the shell body 110, and avoid the short circuit of the battery 1000 during use due to the presence of metal wire or metal debris. At the same time, the first side wall section 11211 with a gradually reduced setting also has a guiding function, which can alleviate the problem of squeezing the mounting hole 1121 due to tolerance or tooling positioning error when the cover body 120 and the shell body 110 are assembled, so that the assembly of the cover body 120 and the shell body 110 is smoother, the shell yield rate is improved, and the cost is reduced. When the second side wall section 1221 away from the cover body 121 is gradually set from the inner side wall of the shell body 110 to the axial direction of the shell body 110 in the direction away from the cover body 121, the contact area between the second side wall section 1221 and the mounting hole 1121 is increased when the second side wall section 1221 is inserted into the mounting hole 1121, so as to avoid the stress between the second side wall section 1221 and the side wall of the mounting hole 1121 from being concentrated at one point, reduce the sharpness of the edge of the side wall of the insertion portion 122, reduce the risk of metal wire or metal debris generated during the installation of the cover body 120 and the shell body 110, and avoid the short circuit of the battery 1000 during use due to the presence of metal wire or metal debris. At the same time, the second side wall section 1221 with a gradually reduced setting also has a guiding function, which can alleviate the problem of squeezing the mounting hole 1121 due to tolerance or tooling positioning error when the cover body 120 and the shell body 110 are assembled, so that the assembly of the cover body 120 and the shell body 110 is smoother, the shell yield rate is improved, and the cost is reduced.

[0073] Reference Figure 1 , Figure 5 and Figure 6In one embodiment, the shell body 110 further includes a first side portion 113 connected between the two first end portions 112, and the first side portion 113 and the two end portions are enclosed together to form a cavity 111. Since the cover body 120 is usually welded and fixed to the shell body 110, the wall thickness of the first side portion 113 is δ, and along the first direction, the orthographic projection of the first side wall segment 11211 is a first ring body, and along the wall thickness direction of the first side portion 113, the thickness of the first ring body is H1, wherein 0.2δ≤H1≤0.8δ, so that the first side wall segment 11211 plays a guiding role when the insertion portion 122 is inserted into the mounting hole 1121, and ensures that the shell assembly 100 meets the sealing and strength requirements when the cover body 120 is welded to the shell body 110. When the thickness of the first ring body is less than 0.2δ, the guiding effect of the first side wall section 11211 will be insufficient, making the edges of the shell body 110 sharper, and it is easy to be squeezed and deformed during the installation of the cover body 120 and the shell body 110, and it is easy to generate metal wires or metal debris. When the thickness of the first ring body is greater than 0.8δ, when the cover body 120 is welded to the shell body 110, the depth and width of the molten pool are difficult to meet the sealing and strength requirements.

[0074] It should be noted that the thickness of the first ring body refers to the distance between the inner ring and the outer ring of the first ring body. Specifically, the thickness of the first ring body is 0.2δ, 0.25δ, 0.3δ, 0.36δ, 0.4δ, 0.47δ, 0.5δ, 0.55δ, 0.6δ, 0.68δ, 0.7δ, 0.76δ or 0.8δ, etc. Specifically, the thickness of the first ring body can be selected as needed, and the present application does not limit this.

[0075] There are many ways to achieve the first side wall section 11211 being tapered along the direction from the mounting hole 1121 to the cavity 111. For example, refer to 1 and Figure 8 In one embodiment, at least part of the first side wall section 11211 is set as a first inclined surface. The existence of the first inclined surface increases the contact area between the insertion portion 122 and the inner side wall of the mounting hole 1121. The stress between the insertion portion 122 and the inner side wall of the mounting hole 1121 will not be concentrated at one point, which reduces the sharpness of the edge of the shell body 110, making it difficult for the insertion portion 122 to generate metal wires or metal debris when inserted into the mounting hole 1121. At the same time, since the first inclined surface has a guiding function, it can alleviate the problem of squeezing the mounting hole 1121 due to tolerance or tooling positioning error during the installation process of the cover body 120 and the shell body 110, making the installation process of the cover body 120 and the shell body 110 smoother. In addition, the setting structure of the first inclined surface is simple and easy to process.

[0076] There are many ways to realize that the first side wall section 11211 is set to be tapered along the direction from the mounting hole 1121 to the cavity 111. In another embodiment, the first side wall section 11211 is at least partially set to a first curved surface. The presence of the first curved surface increases the contact area between the insertion portion 122 and the inner side wall of the mounting hole 1121, and the stress between the insertion portion 122 and the inner side wall of the mounting hole 1121 will not be concentrated at one point, reducing the sharpness of the edge of the shell body 110, so that the insertion portion 122 is not easy to generate metal wire or metal debris when inserted into the mounting hole 1121. At the same time, since the first curved surface has a guiding effect, the problem of squeezing the mounting hole 1121 due to tolerance or tooling positioning error during the installation process of the cover body 120 and the shell body 110 can be alleviated, making the installation process of the cover body 120 and the shell body 110 smoother. In addition, the setting structure of the first curved surface is simple and easy to process. In addition, the setting of the first curved surface improves the aesthetics of the shell body 110.

[0077] It should be noted that, in other embodiments, the first side wall section 11211 may be partially provided with a first inclined surface and partially provided with a first curved surface. When the first inclined surface and the first curved surface are provided at the same time, the first inclined surface and the first curved surface both increase the contact area between the insertion portion 122 and the inner side wall of the mounting hole 1121, which means that the stress will not be concentrated only at one point, but dispersed on a larger contact surface, which helps to reduce the damage to the shell body 110 or the cover body 120 due to stress concentration and the generation of metal wires or metal debris. The presence of the first inclined surface and the first curved surface both effectively reduce the sharpness of the edges of the shell body 110, which reduces the scratches or wear that may be caused by the edges of the insertion portion 122 during the insertion process, and also reduces the generation of metal wires or debris. The first inclined surface and the first curved surface both have a guiding function, which helps to perform smoother alignment and insertion during the installation of the cover body 120 and the shell body 110. This guiding function can significantly reduce the problem of squeezing the mounting hole 1121 due to tolerance or tooling positioning error, making the installation process smoother. The arrangement structure of the first inclined surface and the first curved surface is relatively simple and easy to manufacture, which reduces production costs and improves production efficiency. The existence of the first curved surface not only has the above-mentioned functional advantages, but also significantly improves the aesthetics of the shell body 110.

[0078] Reference Figure 1 , Figure 5 and Figure 6In one embodiment, the shell body 110 further includes a first side portion 113 connected between the two first end portions 112, the wall thickness of the first side portion 113 is δ, and along the first direction, the orthographic projection of the second side wall segment 1221 is a second ring body, and along the wall thickness direction of the first side portion 113, the thickness of the second ring body is H2, wherein 0.4δ≤H2≤1.6δ, so that the second side wall segment 1221 plays a guiding role when inserted into the mounting hole 1121, and ensures that the housing assembly 100 meets the sealing and strength requirements when the cover body 120 is welded with the shell body 110. When the thickness of the second ring body is less than 0.4δ, the guiding role of the second side wall segment 1221 will be insufficient, and the edge of the insertion portion 122 will be sharp, which is easy to be squeezed and deformed during the installation process of the cover body 120 and the shell body 110, and metal wires or metal debris are easy to be generated. When the thickness of the second ring body is greater than 1.6δ, when the cover body 120 is welded to the shell body 110, the depth and width of the molten pool are difficult to meet the sealing and strength requirements.

[0079] It should be noted that the thickness of the second ring body refers to the distance between the inner ring and the outer ring of the second ring body. Specifically, the thickness of the second ring body is 0.4δ, 0.5δ, 0.6δ, 0.7δ, 0.75δ, 0.8δ, 0.88δ, 0.9δ, 1.1δ, 1.2δ, 1.3δ, 1.4δ, 1.5δ or 1.6δ, etc. Specifically, the thickness of the second ring body can be selected as needed, and the present application does not limit this.

[0080] There are many ways to realize that the second side wall section 1221 is gradually reduced in the direction away from the cover body 121. For example, Figure 2 In one embodiment, at least part of the second side wall section 1221 is set as a second inclined surface. The existence of the second inclined surface increases the contact area between the insertion portion 122 and the inner side wall of the mounting hole 1121. The stress between the insertion portion 122 and the inner side wall of the mounting hole 1121 will not be concentrated at one point, which reduces the sharpness of the edge of the insertion portion 122, so that the insertion portion 122 is not easy to generate metal wires or metal debris when inserting the mounting hole 1121. At the same time, because the second inclined surface has a guiding function, it can alleviate the problem of squeezing the mounting hole 1121 due to tolerance or tooling positioning error during the installation process of the cover body 120 and the shell body 110, making the installation process of the cover body 120 and the shell body 110 smoother. In addition, the setting structure of the second inclined surface is simple and easy to process.

[0081] There are many ways to gradually reduce the second side wall section 1221 away from the cover body 121. In another embodiment, at least part of the second side wall section 1221 is set as a second curved surface. The presence of the second curved surface increases the contact area between the insertion portion 122 and the inner side wall of the mounting hole 1121. The stress between the insertion portion 122 and the inner side wall of the mounting hole 1121 will not be concentrated at one point, which reduces the sharpness of the edge of the insertion portion 122, so that the insertion portion 122 is not easy to generate metal wires or metal debris when inserting the mounting hole 1121. At the same time, since the second curved surface has a guiding effect, the problem of squeezing the mounting hole 1121 due to tolerance or tooling positioning error during the installation process of the cover body 120 and the shell body 110 can be alleviated, making the installation process of the cover body 120 and the shell body 110 smoother. In addition, the setting structure of the second curved surface is simple and easy to process. In addition, the setting of the second curved surface improves the aesthetics of the shell body 110.

[0082] It should be noted that, in other embodiments, the second side wall section 1221 may be partially provided with a second inclined surface and partially provided with a second curved surface. When the second inclined surface and the second curved surface are provided at the same time, the second inclined surface and the second curved surface both increase the contact area between the insertion portion 122 and the inner side wall of the mounting hole 1121, which means that the stress will not be concentrated only at one point, but dispersed on a larger contact surface, which helps to reduce the damage to the shell body 110 or the cover body 120 due to stress concentration and the generation of metal wires or metal debris. The presence of the second inclined surface and the second curved surface both effectively reduce the sharpness of the edges of the insertion portion 122, which reduces the scratches or wear that may be caused by the edges of the insertion portion 122 during the insertion process, and also reduces the generation of metal wires or debris. The second inclined surface and the second curved surface both have a guiding function, which helps to perform smoother alignment and insertion during the installation process of the cover body 120 and the shell body 110. This guiding function can significantly reduce the problem of squeezing the mounting hole 1121 due to tolerance or tooling positioning error, making the installation process smoother. The second inclined surface and the second curved surface have a relatively simple structure and are easy to manufacture, which reduces production costs and improves production efficiency. The second curved surface not only has the above-mentioned functional advantages, but also significantly improves the aesthetics of the shell body 110.

[0083] Reference Figures 3 to 9, an embodiment of the present invention further proposes a battery 1000, which includes a shell assembly 100 and an electrode assembly 200 as described above. The specific structure of the shell assembly 100 refers to the above embodiment. Since the present battery 1000 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one. In addition, the electrode assembly 200 is installed in the cavity 111, because the cavity 111 provides a relatively closed and stable environment for the electrode assembly 200. This helps to prevent external contaminants (such as dust, moisture, etc.) from entering the interior, thereby reducing the risk of failure of the battery 1000. The design of the cavity 111 can simplify the assembly process of the battery 1000. The electrode assembly 200 can be directly installed in the cavity 111 without the need for additional fixing devices or complicated assembly steps.

[0084] Reference Figure 3 , Figure 5 and Fig. 9 In one embodiment, the electrode assembly 200 has a second end 210 corresponding to the mounting hole 1121 and a second side 220 connected to the second end 210. The second end 210 has a welding area 211 and a non-welding area 212 surrounding the welding area 211. The design of the welding area 211 makes the welding of the electrode assembly 200 with the shell body 110 or other components more accurate and reliable, which helps to ensure the strength and stability of the welding connection, thereby improving the overall performance of the battery 1000. The battery 1000 also includes a first insulating member, a portion of the first insulating member is used to abut against the non-welding area 212, and another portion of the first insulating member is used to wrap at least a portion of the side portion to insulate and isolate the shell body 110 and the electrode assembly 200, so as to help ensure that the battery 1000 operates under normal working conditions. The use of the non-welding area 212 and the first insulating member helps to reduce electrical interference and noise inside the battery 1000, thereby improving the durability and reliability of the battery 1000.

[0085] When the electrode assembly 200 is wound, the finishing glue is used to fix the finishing, and since the length of the finishing glue will not exceed the axial length of the electrode assembly 200, the insulation of the end face tab flattened area cannot be guaranteed, so it is necessary to stick insulating glue on the side end of the electrode assembly 200. In one embodiment, the two first end portions 112 are each provided with a mounting hole 1121, and the second end portion 210 is provided with two mounting holes, and the second side portion 220 includes two first end side surfaces 221 spaced apart along the first direction, and the two first end side surfaces 221 are respectively connected to the two second end portions 210. Figure 7 and Figure 8The first insulating member includes two insulating covers 310, and the two insulating covers 310 are spaced apart along the first direction. Each insulating cover 310 includes an end insulating portion 311 and a side insulating portion 312 connected to each other. The end insulating portion 311 is in contact with the non-welding area 212, and the side insulating portion 312 is wrapped around the first end side surface 221, thereby enhancing the electrical isolation effect between the shell body 110 and the electrode assembly 200 and improving the safety of the battery 1000. The two insulating covers 310 are spaced apart not only to consider electrical isolation, but also to take into account the heat dissipation requirements, thereby avoiding the problem that the first insulating member wraps the entire second side portion 220, resulting in poor heat dissipation effect of the electrode assembly 200. In addition, the two insulating covers 310 spaced apart reduce the production cost of the first insulating member.

[0086] Reference Figure 4 , Figure 7 and Figure 8 In one embodiment, the battery 1000 further includes a second insulating member 400, which is disposed corresponding to the cover body 120, and the second insulating member 400 is insulated and connected between the corresponding cover body 120 and the second end 210, so that the electrode assembly 200 can be prevented from being short-circuited with the top cover, thereby improving the safety and reliability of the battery 1000.

[0087] Reference Figure 5 and Fig. 9 In one embodiment, along the first direction, the orthographic projection of the second insulating member 400 at the second end 210 is within the non-welding area 212, and the second insulating member 400 is used to press and fix the portion of the first insulating member attached to the non-welding area 212. In this way, the second insulating member 400 can press and fix the first insulating member to the electrode assembly 200 while insulating and connecting the cover body 120 and the electrode assembly 200, thereby preventing the loosening or displacement of the first insulating member due to vibration or impact, and improving the reliability of the insulation between the electrode assembly 200 and the shell body 110.

[0088] Reference Figure 5In one embodiment, a gap 500 is provided between the second insulating member 400 and the inner side wall of the shell body 110. Thus, during the welding process of the cover body 120 and the shell body 110, high temperature will be generated between the shell body 110 and the top cover. If the second insulating member 400 is in close contact with the inner side wall of the shell body 110, the insulating member is likely to be damaged by the high temperature or even lose its insulating performance. By providing the gap 500, the insulating member can be effectively prevented from being directly exposed to a high temperature environment, thereby protecting it from being burned. The second insulating member 400 is an important electrical isolation component in the battery 1000. The quality of its performance directly affects the safety and reliability of the battery 1000. If the second insulating member 400 is damaged due to burning, the electrical isolation performance of the battery 1000 will be greatly reduced. By providing the gap 500, it can be ensured that the second insulating member 400 is not damaged during the welding process, thereby maintaining its good insulating performance.

[0089] It should be noted that the second insulating member 400 can be made of a variety of materials, for example, the second insulating member 400 can be made of rubber, silicone, plastic or ceramic, etc. Specifically, the material of the second insulating member 400 can be selected as needed, and this application does not limit this.

[0090] Reference Figure 4 and Figure 5 In one embodiment, at least one cover 120 is connected and fixed to the shell body 110, and the second insulating member 400 abuts between the corresponding cover 120 and the electrode assembly 200, so that the second insulating member 400 plays a role in fixing the electrode assembly 200, which can prevent the electrode assembly 200 from shaking due to vibration or impact during the operation of the battery 1000. Through the abutment of the second insulating member 400, the connection between the electrode assembly 200 and the cover 120 is tighter and more stable. This stability helps to reduce the vibration and noise inside the battery 1000 and improve the overall performance of the battery 1000. The shaking of the electrode assembly 200 may cause wear or damage to other components inside the battery 1000, thereby affecting the service life and safety of the battery 1000. The fixing effect of the second insulating member 400 effectively reduces the risk of such internal damage.

[0091] Reference Figure 2 , Figure 4 and Figure 5In one embodiment, the cover 120 is provided with a first penetration hole 123 along the first direction, the second insulating member 400 is provided with a second penetration hole 410 along the first direction, the second penetration hole 410 corresponds to the first penetration hole 123, the battery 1000 assembly further includes a connection assembly, the connection assembly is provided corresponding to the cover 120, the connection assembly includes a connector 610 and a pole 620, the connector 610 is welded and fixed to the welding area 211, one end of the pole 620 passes through the first penetration hole 123 and the second penetration hole 410 in sequence to be electrically connected to the connector 610, so that this design enables the pole 620 to smoothly pass through the cover 120 and the second insulating member 400, and realize electrical connection with the connector 610. The welding and fixing of the connector 610 and the welding area 211 ensures the reliability and stability of the connection, and the pole 620 is responsible for transmitting electrical energy from the inside of the battery 1000 to the external circuit. The second insulating member 400 plays an electrical isolation role, preventing the risk of short circuit between the cover plate and the electrode assembly 200, and ensuring the normal operation of the battery 1000. By welding the connector 610 to the welding area 211, and the pole 620 passes through the first penetration hole 123 and the second penetration hole 410 to be electrically connected to the connector 610, this design improves the connection reliability between the battery 1000 and the external circuit. Even in harsh environments such as vibration or impact, the connection assembly can maintain a stable working state.

[0092] Reference Figure 7 and Figure 8 In one embodiment, the second insulating member 400 includes an insulating body 420 and an enclosure 430 protruding from the insulating body 420. The enclosure 430 is extended along the circumference of the insulating body 420 so that the insulating body 420 and the enclosure 430 are suitable for surrounding a receiving groove 440. The receiving groove 440 provides an installation space for the connector 610. The connector 610 is installed in the receiving groove 440, thereby achieving an insulated connection between the cover 120 and the connector 610 and reducing the risk of short circuit. The design of the connector 610 being installed in the receiving groove 440 also ensures the stability and reliability of the connector 610. The combined design of the insulating body 420 and the enclosure 430 significantly enhances the electrical isolation performance of the second insulating member 400.

[0093] Reference Figure 8 In one embodiment, the enclosure portion 430 has a second end side surface 431 that is away from the insulating body 420 and away from the accommodating groove 440. The second end side surface 431 is tapered from the inner side wall of the shell body 110 toward the axial direction of the shell body 110 along the direction away from the insulating body 420. In this way, the second section of the side surface has a guiding function, making it easier to install and disassemble the second insulating member 400.

[0094] Reference Figure 8In one embodiment, the second end side surface 431 is at least partially set to a third inclined surface and / or the second end side surface 431 is at least partially set to a third curved surface. In this way, the stress distribution between the second end side surface 431 and the shell body 110 can be optimized, stress concentration can be reduced, and damage to the shell body 110 and the second insulating member 400 during installation can be avoided.

[0095] Reference Figure 5 , Figure 7 and Figure 8 In one embodiment, the second insulating member 400 further includes a pressing portion 450 protruding from the second side, the pressing portion 450 being located in the receiving groove 440, and the pressing portion 450 being used to press the connector 610 against the welding area 211, so that the presence of the pressing portion 450 allows the connector 610 to be additionally fixed in the receiving groove 440. By pressing the connector 610 against the welding area 211 by the pressing portion 450, the risk of loosening of the connector 610 in dynamic environments such as vibration or impact can be significantly reduced, thereby ensuring the stability and reliability of the connection. The pressing portion 450 presses the connector 610 against the welding area 211, which helps to achieve a tighter electrical contact. Tight contact can reduce contact resistance, thereby reducing energy loss and heat generation, and improving the efficiency of the electrical system.

[0096] Reference Figure 5 In one embodiment, in the first direction, the maximum cross-sectional area of ​​the second insulating member 400 is greater than or equal to the cross-sectional area of ​​the insertion portion 122, so that the first side wall segment 11211 can always be in contact with the second side wall segment 1221 when the cover body 120 and the shell body 110 are assembled together. Thus, the first side wall segment 11211 and the second side wall segment 1221 can play an auxiliary guiding role while reducing damage or wear between the cover body 120 and the shell body 110 during the assembly process.

[0097] An embodiment of the present invention further proposes an energy storage device, which includes the battery 1000 mentioned above. The specific structure of the battery 1000 refers to the above embodiment. Since the energy storage device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0098] The embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A housing assembly, characterized in that: include: A shell body is formed with a cavity, the cavity is used for installing the electrode assembly, the shell body has two first ends arranged opposite to each other along a first direction, at least one of the first ends is penetrated by a mounting hole along the first direction, and the mounting hole is connected to the cavity; At least one cover body is arranged in one-to-one correspondence with the mounting holes, the cover body comprises a cover body and an insertion portion protruding from the cover body, the cover body is used to close the mounting holes, and the insertion portion is inserted into the corresponding mounting holes; wherein, The inner side wall of the mounting hole comprises a first side wall section connected to the first end, and the first side wall section is gradually arranged from the inner side wall of the shell body to the axial direction of the shell body along the direction from the mounting hole to the cavity; and / or, The side wall of the insertion portion includes a second side wall section away from the cover body, and the second side wall section is gradually arranged from the inner side wall of the shell body to the axial direction of the shell body in a direction away from the cover body.

2. The housing assembly according to claim 1, characterized in that: The shell body further includes a first side portion connecting the two first end portions, and the wall thickness of the first side portion is δ; Along the first direction, the orthographic projection of the first side wall segment is a first ring body, and along the wall thickness direction of the first side portion, the thickness of the first ring body is H1, wherein 0.2δ≤H1≤0.8δ.

3. The housing assembly according to claim 1 or 2, characterized in that: The first side wall section is at least partially configured as a first inclined surface and / or the first side wall section is at least partially configured as a first curved surface.

4. The housing assembly according to claim 1, characterized in that: The shell body further includes a first side portion connecting the two first end portions, and the wall thickness of the first side portion is δ; Along the first direction, the orthographic projection of the second side wall segment is a second ring body, and along the wall thickness direction of the first side portion, the thickness of the second ring body is H2, wherein 0.4δ≤H2≤1.6δ.

5. The housing assembly according to claim 1 or 4, characterized in that: The second side wall section is at least partially configured as a second inclined surface and / or the second side wall section is at least partially configured as a second curved surface.

6. A battery, characterized in that: include: The housing assembly according to any one of claims 1 to 5; The electrode assembly is installed in the cavity.

7. The battery according to claim 6, characterized in that The electrode assembly comprises a second end portion arranged corresponding to the mounting hole and a second side portion connected to the second end portion, wherein the second end portion comprises a welding area and a non-welding area arranged around the welding area; The battery further includes a first insulating member, a portion of which is used to abut against the non-welding area, and another portion of which is used to wrap at least a portion of the side portion to insulate and isolate the case body from the electrode assembly.

8. The battery according to claim 7, characterized in that The two first end portions are both provided with the mounting hole; Two second end portions are provided, and the second side portion includes two first end side surfaces spaced apart along the first direction, and the two first end side surfaces are respectively connected to the two second end portions; The first insulating member includes two insulating covers, which are spaced apart along the first direction, and each insulating cover includes an end insulating portion and a side insulating portion connected to each other, the end insulating portion is in contact with the non-welding area, and the side insulating portion is arranged to wrap around the end side surface.

9. The battery according to claim 7 or 8, characterized in that: It also includes a second insulating member, which is arranged corresponding to the cover body and is insulated and connected between the corresponding cover body and the second end.

10. The battery according to claim 9, characterized in that Along the first direction, the orthographic projection of the second insulating member at the second end is located in the non-welding area, and the second insulating member is used to press and fix the portion of the first insulating member attached to the non-welding area.

11. The battery according to claim 9, characterized in that A gap is provided between the second insulating member and the inner side wall of the shell body; and / or, At least one of the covers is connected and fixed to the shell body, and the second insulating member is used to abut between the corresponding cover and the electrode assembly.

12. The battery according to claim 9, characterized in that The cover body is provided with a first through hole along the first direction, and the second insulating member is provided with a second through hole along the first direction, and the second through hole corresponds to the first through hole; The battery assembly also includes a connecting assembly, which is arranged corresponding to the cover body, and includes a connecting piece and a pole, the connecting piece is welded and fixed to the welding area, and one end of the pole passes through the first penetration hole and the second penetration hole in sequence to be electrically connected to the connecting piece.

13. The battery according to claim 12, characterized in that The second insulating member includes an insulating body and a blocking portion protruding from the insulating body, wherein the blocking portion is extended along the circumference of the insulating body so that the insulating body and the blocking portion are suitable for surrounding and forming a receiving groove; The connecting member is installed in the accommodating groove.

14. The battery according to claim 13, characterized in that The enclosure portion has a second end side surface away from the insulating body and away from the accommodating groove, and the second end side surface is arranged to be tapered from the inner side wall of the shell body toward the axial direction of the shell body along a direction away from the insulating body.

15. The battery according to claim 14, characterized in that The second end side surface is at least partially configured as a third inclined surface and / or the second end side surface is at least partially configured as a third curved surface.

16. The battery according to claim 13, characterized in that The second insulating member further includes a pressing portion protruding from the second side, the pressing portion is located in the accommodating groove, and the pressing portion is used to press the connecting member against the welding area.

17. An energy storage device, characterized in that: Comprising a battery as claimed in any one of claims 6 to 16.

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