Shell assembly, battery and energy storage equipment

Abstract

The utility model provides a casing assembly, battery and energy storage equipment, casing assembly includes casing main part and at least one cover body, casing main part forms the cavity, casing main part has two opposite first end portion, at least one first end portion is equipped with the mounting hole, the mounting hole is communicated with the cavity, and the casing main part is equipped with the cover body. 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 utility model relates to energy storage technical field, concretely relates to shell assembly, battery and energy storage equipment. BACKGROUND

[0002] When the shell main body and the cover are assembled, the insertion part of the cover is usually inserted from the mounting hole of the shell main body, however, in the assembling process, the insertion part is easy to scratch or even extrude the mounting hole, which may generate metal debris or even metal wire, increasing the risk of short circuit during the use of the battery; the insertion part is easy to extrude the mounting hole, which may cause the deformation of the shell, reducing the yield and increasing the cost. SUMMARY

[0003] The embodiment of the utility model provides a kind of shell assembly, battery and energy storage equipment, to solve the problem of related art in the shell main body and the cover conversion process insertion part is easy to scratch or even extrude mounting hole, thereby increasing the risk of short circuit during the use of the battery and the deformation of shell, which reduces the yield and increases the cost.

[0004] In the first aspect, the embodiment of the utility model provides a kind of shell assembly.

[0005] In an embodiment, the shell assembly comprises:

[0006] The shell main body is formed with a cavity, and the cavity is used to install the electrode assembly, the shell main body has two first end portions arranged opposite in the first direction, at least one first end portion is provided with a mounting hole penetrating in the first direction, and the mounting hole is in communication with the cavity;

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

[0008] The inner side wall of the mounting hole comprises a first side wall segment connected with the first end portion, and the first side wall segment is tapered from the inner side wall of the shell main body to the axis direction of the shell main body in the direction from the mounting hole to the cavity; and / or,

[0009] The side wall of the insertion part comprises a second side wall segment away from the cover main body, and the second side wall segment is tapered from the inner side wall of the shell main body to the axis direction of the shell main body in the direction away from the cover main body.

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

[0011] In the first direction, a projection of the first side wall section is a first ring body, and in a wall thickness direction of the first side, a thickness of the first ring body is H1, where 0.2δ≤H1≤0.8δ.

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

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

[0014] In the first direction, a projection of the second side wall section is a second ring body, and in a wall thickness direction of the first side, a thickness of the second ring body is H2, where 0.4δ≤H2≤1.6δ.

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

[0016] In a second aspect, embodiments of the present application provide a battery.

[0017] In an embodiment, the battery comprises:

[0018] The shell assembly as described above;

[0019] An electrode assembly installed in the cavity.

[0020] In an embodiment, the electrode assembly has a second end section provided corresponding to the mounting hole and a second side section connected to the second end section, the second end section has a welding area and a non-welding area surrounding a periphery of the welding area;

[0021] The battery further comprises a first insulating member, a portion of the first insulating member is used to abut the non-welding area, and another portion of the first insulating member is used to wrap at least a portion of the side section, so as to insulate and isolate the shell body and the electrode assembly.

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

[0023] The second end section is provided with two, and the second side section comprises two first end side surfaces spaced apart in the first direction, and the two first end side surfaces are respectively connected to the two second end sections;

[0024] The first insulation member comprises two insulation covers, the two insulation covers are arranged in the first direction, each of the two insulation covers comprises a connected end insulation part and a side insulation part, the end insulation part is connected to the non-welding area, and the side insulation part is arranged on the end side surface.

[0025] In an embodiment, a second insulation member is further included, the second insulation member is arranged corresponding to the cover body, and the second insulation member is insulatedly connected between the corresponding cover body and the second end part.

[0026] In an embodiment, in the first direction, a projection part of the second insulation member on the second end part is located in the non-welding area, and the second insulation member is used to press and fix the part of the first insulation member connected to the non-welding area.

[0027] In an embodiment, a gap is arranged between the second insulation member and the inner side wall of the shell body; and / or,

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

[0029] In an embodiment, the cover body is provided with a first through hole in the first direction, the second insulation member is provided with a second through hole in the first direction, and the second through hole corresponds to the first through hole;

[0030] The battery assembly further comprises a connecting assembly, the connecting assembly is arranged corresponding to the cover body, the connecting assembly comprises a connecting piece and a pole, the connecting piece is welded and fixed to the welding area, and one end of the pole is sequentially connected to the connecting piece through the first through hole and the second through hole.

[0031] In an embodiment, the second insulation member comprises an insulation body and a surrounding part protruding from the insulation body, the surrounding part is arranged along the circumferential direction of the insulation body, so that the insulation body and the surrounding part are adapted to form an accommodating groove;

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

[0033] In an embodiment, the surrounding part has a second end side surface away from the insulation body and away from the accommodating groove, and the second end side surface is arranged in a direction away from the insulation body and is arranged in a direction away from the axis of the shell body.

[0034] In an embodiment, the second end side surface is at least partially arranged as a third inclined surface and / or the second end side surface is at least partially arranged as a third curved surface.

[0035] In an embodiment, the second insulation member further comprises a pressing portion protruding from the second side, the pressing portion being located in the accommodating groove, and the pressing portion is used to press the connecting member to the welding area.

[0036] In a third aspect, the embodiments of the utility model provide a kind of energy storage equipment.

[0037] In an embodiment, the energy storage equipment comprises the battery as described above.

[0038] The beneficial effects of the embodiments of the utility model are as follows:

[0039] In the embodiments of the utility model, when the first side wall section connected with the first end portion is gradually tapered from the inner side wall of the shell body to the axis direction of the shell body along the mounting hole to the cavity direction, the contact area is increased when the insertion portion contacts the first side wall section, stress between the insertion portion and the first side wall section is avoided from being concentrated on a point, the sharpness of the edge of the shell body is reduced, the risk of generating metal wires or metal debris during the installation of the cover body and the shell body is reduced, and short circuit of the battery during use due to the existence of metal wires or metal debris is avoided. Meanwhile, the first side wall section which is gradually tapered also has a guiding effect, which can alleviate the problem of extruding the mounting hole caused by tolerance or positioning error during the assembly of the cover body and the shell body, so that the assembly of the cover body and the shell body is smoother, the yield of the shell is improved, and the cost is reduced. When the second side wall section away from the cover body is gradually tapered from the inner side wall of the shell body to the axis direction of the shell body along the direction away from the cover body, the contact area between the second side wall section and the mounting hole is increased when the second side wall section is inserted into the mounting hole, stress between the second side wall section and the side wall of the mounting hole is avoided from being concentrated on a point, the sharpness of the edge of the side wall of the insertion portion is reduced, the risk of generating metal wires or metal debris during the installation of the cover body and the shell body is reduced, and short circuit of the battery during use due to the existence of metal wires or metal debris is avoided. Meanwhile, the second side wall section which is gradually tapered also has a guiding effect, which can alleviate the problem of extruding the mounting hole caused by tolerance or positioning error during the assembly of the cover body and the shell body, so that the assembly of the cover body and the shell body is smoother, the yield of the shell is improved, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0041] Figure 1 is the explosion schematic view of the shell assembly provided by the embodiments of the utility model;

[0042] Figure 2 yes Figure 1 The diagram shows a cross-sectional view of the cover.

[0043] Figure 3 This is a schematic diagram of the battery structure provided in an embodiment of the present invention;

[0044] Figure 4 yes Figure 3 A cross-sectional view of the battery shown.

[0045] Figure 5 yes Figure 4 The enlarged view of point A;

[0046] Figure 6 yes Figure 4 The enlarged view of section B;

[0047] Figure 7 yes Figure 3 The diagram shows the structure of the second insulating component;

[0048] Figure 8 yes Figure 7 The diagram shows a front view of the second insulating component.

[0049] Figure 9 yes Figure 3 The diagram shows the structure of the electrode assembly.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1000, battery;

[0052] 100. Shell assembly; 110. Shell body; 111. Cavity; 112. First end; 1121. Mounting hole; 11211. First side wall section; 113. First side; 120. Cover; 121. Cover body; 122. Insertion part; 1221. Second side wall section; 123. First through hole;

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

[0054] 310. Insulating cover; 311. End insulating part; 312. Side insulating part;

[0055] 400, second insulating element; 410, second through hole; 420, insulating body; 430, enclosure part; 431, second end side; 440, receiving groove; 450, pressing part.

[0056] 500, gap;

[0057] 610. Connector; 620. Pole post. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model. In addition, it should be understood that the specific embodiments described herein are only used for illustrating and explaining the utility model, and are not used for limiting the utility model. In the utility model, the orientation words such as 'up' and 'down' are generally used for indicating the up and down in the actual use or working state of the device, and the specific is the drawing direction in the drawings; and 'inner' and 'outer' are used for the contour of the device.

[0059] When the shell body and the cover of the shell assembly are assembled, the insertion part of the cover is usually inserted from the mounting hole of the shell body, however, in the assembly process, the insertion part is easy to scratch or even extrude the mounting hole, when the insertion part scratches the mounting hole, metal debris or even metal wire is easy to be generated, increasing the short circuit risk in the use process of the battery; when the insertion part extrudes the mounting hole, the shell is easy to be deformed, reducing the yield rate and increasing the cost.

[0060] In view of this, the utility model provides a kind of shell assembly, Figure 1 And Figure 2 The structural schematic diagram of the embodiment of the shell assembly provided by the utility model, Figures 3 to 9 The structural schematic diagram of the embodiment of the battery provided by the utility model. The shell assembly 100 provided by the utility model can avoid the problem that insertion part scratches or even extrudes mounting hole in the assembly process of shell body and cover, reduce the short circuit risk in the use process of the battery, improve the yield rate of shell, reduce cost. The shell assembly 100 will be described in detail in connection with main drawing as follows.

[0061] Referring to Figure 1 And Figure 2 The shell assembly 100 includes shell body 110 and at least one cover 120.

[0062] The shell body 110 is formed with a cavity 111 for mounting the electrode assembly 200, which ensures that the electrode assembly 200 can be stably mounted in the shell body 110 and avoids damage caused by external impact or vibration. The shell body 110 has two first ends 112 oppositely arranged along a first direction, and at least one first end 112 is provided with a mounting hole 1121 penetratingly arranged along the first direction, which communicates with the cavity 111. In this way, the electrode assembly 200 can be conveniently loaded into 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, the mounting hole 1121 can be provided on one first end 112, or the mounting hole 1121 can be provided on both first ends 112. Specifically, the number of first ends 112 provided with the mounting hole 1121 can be set as needed, which is not limited in the present application. In addition, the shell body 110 has various shapes, for example, the shell body 110 can be cylindrical or cuboid, and the like. Specifically, the present application is not limited in this regard.

[0064] Referring to Figure 3 and Figure 4 At least one cover 120 is provided corresponding to the mounting hole 1121, and 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, and the insertion portion 122 is inserted into the corresponding mounting hole 1121. In this way, it can prevent external dust, moisture, humidity and other pollutants from entering the shell body 110 through the mounting hole 1121, thereby causing damage to the internal electrode assembly 200 or other sensitive elements. The insertion portion 122 protrudes from the cover body 121 and is inserted into the corresponding mounting hole 1121, so that the installation process of the shell body 110 and the cover 120 is more intuitive and convenient. 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 installation difficulty.

[0065] It should be noted that after the cover 120 is installed with the shell body 110, the sealing means (such as a sealing ring, sealing glue, etc.) can be used to realize the sealing of the connection between the cover 120 and the shell body 110, so as to ensure the sealing of the cavity 111 and prevent external pollutants such as dust and moisture from entering the shell body 110, thereby causing damage to the electrode assembly 200.

[0066] Specifically, the number of covers 120 can be set as needed. For example, when the mounting hole 1121 is provided with one, the cover 120 is correspondingly provided with one. When the mounting hole 1121 is provided with two, the cover 120 is correspondingly provided with two. The number of covers 120 is not limited in the present application.

[0067] With reference to Figure 5 and Figure 6 The inner side wall of the mounting hole 1121 includes a first side wall segment 11211 connected with the first end 112, and the first side wall segment 11211 is tapered from the inner side wall of the shell body 110 to the axis 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 shape of the cross section of the mounting hole 1121 can be various, for example, the cross section of the mounting hole 1121 can be circular, rectangular, square or oval, etc. Specifically, the specific shape of the mounting hole 1121 can be set as needed, and the present application does not limit it.

[0070] With reference to Figure 5 and Figure 6 The side wall of the insertion part 122 includes a second side wall segment 1221 away from the cover body 121, and the second side wall segment 1221 is tapered from the inner side wall of the shell body 110 to the axis direction of the shell body 110 along the 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 insertion segment corresponding to the second side wall segment 1221 of the insertion part is gradually reduced along the direction away from the cover body 121.

[0072] In the embodiment of the utility model, when the first side wall section 11211 connected with the first end part 112 is gradually reduced from the inside wall of the shell main body 110 to the axis direction of the shell main body 110 along the mounting hole 1121 to the cavity 111 direction, the contact area is increased when the insertion part 122 contacts with the first side wall section 11211, the stress between the insertion part 122 and the first side wall section 11211 is avoided to concentrate in a point, the sharp degree of the edge of the shell main body 110 is reduced, the risk of generating metal wire or metal debris in the installation process of the cover body 120 and the shell main body 110 is reduced, the short circuit of the battery 1000 in the use process due to the existence of metal wire or metal debris is avoided. Meanwhile, the first side wall section 11211 of gradually reducing setting also has the guiding effect, can relieve the problem of extruding the mounting hole 1121 due to the tolerance or tool positioning error when the cover body 120 and the shell main body 110 are assembled, makes the cover body 120 and the shell main body 110 assemble more smoothly, improves the shell yield, reduces the cost. When the second side wall section 1221 away from the cover main body 121 is gradually reduced from the inside wall of the shell main body 110 to the axis direction of the shell main body 110 along the direction away from the cover main body 121, the contact area between the second side wall section 1221 and the mounting hole 1121 is increased when the insertion mounting hole 1121, the stress between the second side wall section 1221 and the side wall of the mounting hole 1121 is avoided to concentrate in a point, the sharp degree of the edge of the side wall of the insertion part 122 is reduced, the risk of generating metal wire or metal debris in the installation process of the cover body 120 and the shell main body 110 is reduced, the short circuit of the battery 1000 in the use process due to the existence of metal wire or metal debris is avoided. Meanwhile, the second side wall section 1221 of gradually reducing setting also has the guiding effect, can relieve the problem of extruding the mounting hole 1121 due to the tolerance or tool positioning error when the cover body 120 and the shell main body 110 are assembled, makes the cover body 120 and the shell main body 110 assemble more smoothly, improves the shell yield, reduces the cost.

[0073] Referring to Figure 1 , Figure 5 and Figure 6In an embodiment, the shell body 110 further comprises a first side portion 113 connecting the two first end portions 112, and the first side portion 113 and the two end portions together enclose the cavity 111. Since the cover 120 is usually welded with the shell body 110, the wall thickness of the first side portion 113 is δ, the first side wall segment 11211 has a first ring body in the orthographic projection along the first direction, and the thickness of the first ring body along the wall thickness direction of the first side portion 113 is H1, where 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 cover 120 meets the sealing and strength requirements when it is welded with 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 segment 11211 will be insufficient, and the edges of the shell body 110 will be too sharp, which will easily cause the shell body 110 to be squeezed and deformed during the installation of the cover 120 and the shell body 110, and metal wires or metal debris will be generated. When the thickness of the first ring body is greater than 0.8δ, the penetration and width of the molten pool when the cover 120 is welded with the shell body 110 will not 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 circle and the outer circle 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 it.

[0075] There are many ways to achieve the tapered arrangement of the first side wall segment 11211 along the direction from the mounting hole 1121 to the cavity 111, for example, Referring to 1 and Figure 8 In an embodiment, the first side wall segment 11211 is at least partially provided as a first inclined surface, and the presence of the first inclined 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 in one point, which reduces the sharpness of the edges of the shell body 110, so that the insertion portion 122 is not easy to generate metal wires or metal debris when it is inserted into the mounting hole 1121. At the same time, since the first inclined surface has a guiding effect, it can alleviate the problem of squeezing the mounting hole 1121 caused by tolerances or positioning errors during the installation of the cover 120 and the shell body 110, so that the installation process of the cover 120 and the shell body 110 is smoother. In addition, the first inclined surface has a simple and easy-to-process structure.

[0076] There are various ways to realize the tapered arrangement of the first side wall segment 11211 in the direction from the mounting hole 1121 to the cavity 111. In yet another embodiment, the first side wall segment 11211 is at least partially arranged as 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 is not concentrated on a single point, which reduces the sharpness of the edges of the shell body 110, so that the insertion portion 122 is less likely to generate metal wires or metal debris when inserted into the mounting hole 1121. At the same time, the first curved surface has a guiding effect, which can alleviate the problem of extruding the mounting hole 1121 due to tolerances or tool positioning errors during the installation 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 first curved surface has a simple structure and is easy to process. In addition, the first curved surface improves the aesthetic appearance of the shell body 110.

[0077] It should be noted that in other embodiments, the first side wall segment 11211 can be partially arranged as a first inclined surface and partially arranged as a first curved surface. When the first inclined surface and the first curved surface are arranged at the same time, both the first inclined surface and the first curved surface increase the contact area between the insertion portion 122 and the inner side wall of the mounting hole 1121, which means that the stress is not concentrated on a single point, but is dispersed on a larger contact surface, which helps to reduce the generation of metal wires or metal debris due to damage to the shell body 110 or the cover body 120 caused by stress concentration. The presence of the first inclined surface and the first curved surface effectively reduces the sharpness of the edges of the shell body 110, which reduces the scratches or abrasions that the edges can cause during the insertion process of the insertion portion 122, and also reduces the generation of metal wires or debris. Both the first inclined surface and the first curved surface have a guiding effect, which helps to align and insert more smoothly during the installation process of the cover body 120 and the shell body 110. This guiding function can significantly reduce the problem of extruding the mounting hole 1121 due to tolerances or tool positioning errors, making the installation process smoother. The first inclined surface and the first curved surface have a relatively simple structure and are easy to manufacture. This reduces production costs and improves production efficiency. The presence of the first curved surface not only has the above functional advantages, but also significantly improves the aesthetic appearance of the shell body 110.

[0078] Referring to Figure 1 , Figure 5 and Figure 6In an embodiment, the shell body 110 further comprises a first side portion 113 connecting the two first end portions 112, the wall thickness of the first side portion 113 is δ, the normal projection of the second side wall segment 1221 along the first direction is a second ring body, the thickness of the second ring body along the wall thickness direction of the first side portion 113 is H2, wherein 0.4δ≤H2≤1.6δ, so that the second side wall segment 1221 plays a guiding role when being inserted into the mounting hole 1121, and ensures that the cover body 120 meets the sealing and strength requirements when being 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, the edges of the insertion portion 122 will be too sharp, and metal wires or metal debris will be easily generated during the installation of the cover body 120 and the shell body 110. When the thickness of the second ring body is greater than 1.6δ, the penetration and width of the molten pool during the welding of the cover body 120 and the shell body 110 will not 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 circle and the outer circle 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, which is not limited in the present application.

[0080] There are many ways to realize the tapered arrangement of the second side wall segment 1221 in the direction away from the cover body 121, for example, referring to Figure 2 In an embodiment, the second side wall segment 1221 is at least partially arranged 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 in one point, which reduces the sharpness of the edges of the insertion portion 122, so that the insertion portion 122 is not easy to generate metal wires or metal debris when being inserted into the mounting hole 1121. At the same time, since the second inclined surface has a guiding effect, it can alleviate the problem of extruding the mounting hole 1121 caused by tolerance or positioning error during the installation of the cover body 120 and the shell body 110, so that the installation process of the cover body 120 and the shell body 110 is more smooth. In addition, the second inclined surface has a simple and easy-to-process structure.

[0081] The second side wall section 1221 can be arranged in various ways in a tapered manner away from the cover body 121. In another embodiment, the second side wall section 1221 is at least partially arranged 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, and the stress between the insertion portion 122 and the inner side wall of the mounting hole 1121 is not concentrated at one point, reducing the sharpness of the edges of the insertion portion 122, so that metal wires or metal debris are not easily generated when the insertion portion 122 is inserted into the mounting hole 1121. At the same time, due to the guiding effect of the second curved surface, the problem of extruding the mounting hole 1121 due to tolerances or tool positioning errors during the installation 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 second curved surface has a simple structure and is easy to process. In addition, 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 can be partially arranged as a second inclined surface and partially arranged as a second curved surface. When the second inclined surface and the second curved surface are arranged at the same time, both the second inclined surface and the second curved surface increase the contact area between the insertion portion 122 and the inner side wall of the mounting hole 1121, which means that the stress is not concentrated at only one point, but is dispersed over a larger contact area, which helps to reduce the generation of metal wires or metal debris due to damage to the shell body 110 or the cover body 120 caused by stress concentration. The presence of the second inclined surface and the second curved surface effectively reduces the sharpness of the edges of the insertion portion 122, which reduces the scratches or abrasions that can be caused by the edges of the insertion portion 122 during the insertion process, and also reduces the generation of metal wires or debris. Both the second inclined surface and the second curved surface have a guiding effect, which helps to align and insert more smoothly during the installation of the cover body 120 and the shell body 110. This guiding function can significantly reduce the problem of extruding the mounting hole 1121 due to tolerances or tool positioning errors, making the installation process smoother. The second inclined surface and the second curved surface have a relatively simple structure and are easy to manufacture. This reduces production costs and improves production efficiency. The presence of the second curved surface not only has the above functional advantages, but also significantly improves the aesthetics of the shell body 110.

[0083] Referring to Figures 3 to 9The embodiment of the utility model discloses a battery 1000, the battery 1000 includes the shell subassembly 100 and electrode subassembly 200 as above, the specific structure of shell subassembly 100 refers to the above embodiment, because the battery 1000 of the utility model adopts all the technical solutions of the above all embodiments, therefore at least has all the beneficial effects brought by the technical scheme of the above embodiment, here will not repeat again. In addition, electrode subassembly 200 is installed in the cavity 111, because the cavity 111 provides a relatively closed and stable environment for electrode subassembly 200. This helps to prevent external contaminants (such as dust, moisture, etc.) from entering the interior, thereby reducing the risk of battery 1000 failure. The design of the cavity 111 can simplify the assembly process of the battery 1000. The electrode subassembly 200 can be directly installed into the cavity 111 without the need for additional fixing devices or complex assembly steps.

[0084] Referring to Figure 3 , Figure 5 and Figure 9 In an embodiment, the electrode assembly 200 has a second end portion 210 disposed corresponding to the mounting hole 1121 and a second side portion 220 connected to the second end portion 210. The second end portion 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 precise 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 which is used to abut the non-welding area 212, and another portion of which is used to wrap at least part of the side portion to insulate and isolate the shell body 110 and the electrode assembly 200. In this way, it helps to 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] Since the electrode assembly 200 is fixed by the end fixing glue when winding, the length of the end fixing glue cannot exceed the axial length of the electrode assembly 200, so the insulation of the end face tab rubbing area cannot be guaranteed, and therefore insulation glue needs to be attached to the side end portion of the electrode assembly 200. In an embodiment, both first end portions 112 are provided with mounting holes 1121, and two second end portions 210 are provided. The second side portion 220 includes two first end side faces 221 spaced apart in the first direction, and the two first end side faces 221 are respectively connected to the two second end portions 210. Referring to Figure 7 and Figure 8The first insulation member includes two insulation covers 310 which are spaced apart along the first direction. Each insulation cover 310 includes an end insulation part 311 and a side insulation part 312 which are connected. The end insulation part 311 is attached to the non-welding area 212, and the side insulation part 312 is arranged to wrap the first end side 221. The electrical isolation effect between the shell body 110 and the electrode assembly 200 is enhanced, and the safety of the battery 1000 is improved. The two insulation covers 310 are spaced apart, which not only considers the electrical isolation, but also takes into account the heat dissipation requirement, avoiding the problem that the first insulation member wraps the entire second side 220, resulting in poor heat dissipation effect of the electrode assembly 200. In addition, the two spaced-apart insulation covers 310 reduce the production cost of the first insulation member.

[0086] With reference to Figure 4 , Figure 7 and Figure 8 In an embodiment, the battery 1000 further includes a second insulation member 400 corresponding to the cover 120. The second insulation member 400 is insulatedly connected between the corresponding cover 120 and the second end 210. In this way, 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] With reference to Figure 5 and Figure 9 In an embodiment, along the first direction, the second insulation member 400 is located in the non-welding area 212 at the orthographic projection part of the second end 210. The second insulation member 400 is used to press and fix the part of the first insulation member attached to the non-welding area 212. In this way, the second insulation member 400 can press and fix the first insulation member to the electrode assembly 200 while insulatingly connecting the cover 120 and the electrode assembly 200. The loosening or displacement of the first insulation member caused by vibration or impact is prevented, and the reliability of the insulation between the electrode assembly 200 and the shell body 110 can be improved.

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

[0089] It should be noted that the second insulation member 400 can be made of various materials, for example, the material of the second insulation member 400 can include rubber, silicone, plastic, or ceramic, etc. Specifically, the material of the second insulation member 400 can be selected as needed, which is not limited in the present application.

[0090] Referring to Figure 4 and Figure 5 In an embodiment, at least one cover 120 is connected and fixed with the shell body 110, and the second insulation member 400 abuts between the corresponding cover 120 and the electrode assembly 200, so that the second insulation 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 insulation member 400, the connection between the electrode assembly 200 and the cover 120 is more closely and stably, and such 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 can 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 insulation member 400 effectively reduces the risk of such internal damage.

[0091] Referring to Figure 2 , Figure 4 and Figure 5In an embodiment, the cover 120 is provided with a first through hole 123 in the first direction, the second insulating member 400 is provided with a second through hole 410 in the first direction, the second through hole 410 corresponds to the first through hole 123, and the battery 1000 assembly further comprises a connecting assembly corresponding to the cover 120, the connecting assembly comprises a connecting piece 610 and a pole 620, the connecting piece 610 is welded and fixed with the welding area 211, one end of the pole 620 passes through the first through hole 123 and the second through hole 410 in sequence and is electrically connected with the connecting piece 610, so that the pole 620 can pass through the cover 120 and the second insulating member 400 smoothly and is electrically connected with the connecting piece 610. The welding and fixing of the connecting piece 610 and the welding area 211 ensure 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 presence of 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 and fixing the connecting piece 610 and the welding area 211, and electrically connecting the pole 620 with the connecting piece 610 through the first through hole 123 and the second through hole 410, the design improves the connection reliability of the battery 1000 and the external circuit. Even in harsh environments such as vibration or impact, the connecting assembly can maintain a stable working state.

[0092] With reference to Figure 7 And Figure 8 In an embodiment, the second insulating member 400 comprises an insulating body 420 and a surrounding part 430 protruding from the insulating body 420, the surrounding part 430 is arranged along the circumference of the insulating body 420 to form a containing groove 440 with the insulating body 420 and the surrounding part 430, the containing groove 440 provides a mounting space for the connecting piece 610, the connecting piece 610 is mounted in the containing groove 440 to realize the insulating connection between the cover 120 and the connecting piece 610 and reduce the risk of short circuit. The design of mounting the connecting piece 610 in the containing groove 440 also ensures the stability and reliability of the connecting piece 610. The combined design of the insulating body 420 and the surrounding part 430 significantly enhances the electrical isolation performance of the second insulating member 400.

[0093] With reference to Figure 8 In an embodiment, the surrounding part 430 has a second end side 431 away from the insulating body 420 and away from the containing groove 440, the second end side 431 is arranged in a reducing manner from the inner side wall of the shell body 110 to the axis direction of the shell body 110 away from the insulating body 420, so that the second end side has a guiding effect, making the second insulating member 400 more convenient to install and disassemble.

[0094] With reference to Figure 8In an embodiment, the second end side surface 431 is at least partially provided as a third inclined surface and / or the second end side surface 431 is at least partially provided as a third curved surface, so that the stress distribution between the second end side surface 431 and the shell main body 110 can be optimized, the stress concentration phenomenon can be reduced, and the damage of the shell main body 110 and the second insulating part 400 during the installation process can be avoided.

[0095] With reference to Figure 5 , Figure 7 and Figure 8 In an embodiment, the second insulating part 400 further comprises a pressing part 450 protruding from the second side, the pressing part 450 is located in the accommodating groove 440, and the pressing part 450 is used to press the connecting part 610 to the welding area 211, so that the presence of the pressing part 450 makes the connecting part 610 fixed in the accommodating groove 440. By pressing the connecting part 610 to the welding area 211 through the pressing part 450, the risk of loosening of the connecting part 610 in a dynamic environment such as vibration or impact can be significantly reduced, thereby ensuring the stability and reliability of the connection. The pressing part 450 presses the connecting part 610 to the welding area 211, which helps to achieve a tighter electrical contact. The tight contact can reduce the contact resistance, thereby reducing energy loss and heat generation, and improving the efficiency of the electrical system.

[0096] With reference to Figure 5 In an embodiment, in the first direction, the maximum cross-sectional area of the second insulating part 400 is greater than or equal to the cross-sectional area of the insertion part 122, so that the first side wall segment 11211 can always be in contact with the second side wall segment 1221 when the cover 120 and the shell main body 110 are cooperatively installed, thereby reducing damage or wear between the cover 120 and the shell main body 110 during assembly.

[0097] The embodiment of the utility model further proposes a kind of energy storage equipment, energy storage equipment includes the battery 1000 as described above, the specific structure of battery 1000 refers to the above embodiment, since the present energy storage equipment adopts all technical solutions of the above all embodiments, at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be described one by one here.

[0098] The embodiments of the utility model are described in detail above, the principle and implementation mode of the utility model are described by applying specific examples in this paper, and the above embodiment is only used to help understand the method and core idea of the utility model;Meanwhile, for those skilled in the art, according to the idea of the utility model, specific implementation mode and application range will be changed, and the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A housing assembly, characterized by, The shell body is formed with a cavity for mounting an electrode assembly, the shell body has two first end portions oppositely arranged along a first direction, at least one of the first end portions is provided with a mounting hole penetratingly arranged along the first direction, and the mounting hole is in communication with the cavity. The mounting hole has an inner side wall including a first side wall segment connected with the first end portion, the first side wall segment is taperedly arranged from the inner side wall of the shell body to an axial direction of the shell body along a direction from the mounting hole to the cavity, and / or The insertion portion has a side wall including a second side wall segment away from the cover body, the second side wall segment is taperedly arranged from the inner side wall of the shell body to the axial direction of the shell body along a direction away from the cover body. The shell body further includes a first side portion connecting between the two first end portions, and a wall thickness of the first side portion is δ; Along the first direction, a projection of the first side wall segment is a first ring body, and along a wall thickness direction of the first side portion, a thickness of the first ring body is H1, where 0.2δ≤H1≤0.8δ.

2. The housing assembly of claim 1, wherein, The first side wall segment is at least partially arranged as a first inclined surface and / or the first side wall segment is at least partially arranged as a first curved surface. The shell body further includes a first side portion connecting between the two first end portions, and a wall thickness of the first side portion is δ; 3. The housing assembly of claim 1 or 2, wherein, Along the first direction, a projection of the second side wall segment is a second ring body, and along a wall thickness direction of the first side portion, a thickness of the second ring body is H2, where 0.4δ≤H2≤1.6δ.

4. The housing assembly of claim 1, wherein, The second side wall segment is at least partially arranged as a second inclined surface and / or the second side wall segment is at least partially arranged as a second curved surface. The shell assembly includes:

5. The housing assembly of claim 1 or 4, wherein, The shell assembly according to any one of claims 1 to 5; 6. A battery, characterized by The electrode assembly is mounted in the cavity. The electrode assembly has a second end portion arranged corresponding to the mounting hole and a second side portion connected with the second end portion, the second end portion has a welding area and a non-welding area surrounding a side of the welding area; The battery further includes a first insulating member, a part of the first insulating member is used to abut the non-welding area, and another part of the first insulating member is used to wrap at least part of the side portion to insulate and isolate the shell body and the electrode assembly.

7. The battery of claim 6, wherein, Both of the first end portions are provided with the mounting hole; The second end portion is provided with two, 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 with the two second end portions; 8. The battery of claim 7, wherein, The first insulating member includes two insulating covers, the two insulating covers are spaced apart along the first direction, each of the insulating covers includes a end insulating portion and a side insulating portion connected with each other, the end insulating portion abuts the non-welding area, and the side insulating portion wraps the end side surface. ​ ​ 9. The battery according to claim 7 or 8, characterized in that, The second insulation member is arranged corresponding to the cover body and is insulatedly connected between the corresponding cover body and the second end portion.

10. The battery of claim 9, wherein, In the first direction, a projection of the second insulation member on the second end portion is located in the non-welding area, and the second insulation member is used to press and fix the part of the first insulation member attached to the non-welding area.

11. The battery of claim 9, wherein, A gap is arranged between the second insulation member and the inner side wall of the shell body; and / or, At least one of the cover bodies is connected and fixed with the shell body, and the second insulation member is used to abut between the corresponding cover body and the electrode assembly.

12. The battery of claim 9, wherein, The cover body is provided with a first through hole in the first direction, and the second insulation member is provided with a second through hole in the first direction, the second through hole corresponding to the first through hole; The battery assembly further comprises a connecting assembly arranged corresponding to the cover body, the connecting assembly comprising a connecting piece and a pole, the connecting piece being welded and fixed with the welding area, and one end of the pole being electrically connected with the connecting piece in sequence through the first through hole and the second through hole.

13. The battery of claim 12, wherein, The second insulation member comprises an insulation body and a surrounding portion protruding from the insulation body, the surrounding portion being arranged along the circumference of the insulation body so that the insulation body and the surrounding portion are adapted to form an accommodating groove. The connecting piece is mounted in the accommodating groove.

14. The battery of claim 13, wherein, The surrounding portion has a second end side away from the insulation body and away from the accommodating groove, the second end side being arranged in a direction away from the insulation body and being arranged in a direction of the axis of the shell body in a decreasing manner.

15. The battery of claim 14, wherein, The second end side is at least partially arranged as a third inclined surface and / or the second end side is at least partially arranged as a third curved surface.

16. The battery of claim 13, wherein, The second insulation member further comprises a pressing portion protruding from the second side, the pressing portion being located in the accommodating groove, and the pressing portion being used to press the connecting piece to the welding area.

17. An energy storage device, comprising: The battery comprises the battery as claimed in any one of claims 6 to 16.

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