Shell assembly and battery with same

Abstract

The invention provides a shell assembly and a battery with the same. The shell assembly comprises a shell, a pole and an insulation sealing structure, wherein the shell is provided with an accommodating cavity; the pole comprises a first pole body, a second pole body and a third pole body, the first pole body is located outside the containing cavity, the second pole body is located in the containing cavity, and the third pole body penetrates through the shell and is connected with the first pole body and the second pole body. The insulation sealing structures are arranged between the third column body and the shell, the insulation sealing structures are arranged between the first column body and the shell and between the second column body and the shell, and the insulation sealing structures are in interference fit with the peripheral surface of the third column body; the projection of the outer edge of the second cylinder in the direction of the insulation sealing structure is located on the insulation sealing structure, and the distance between the projection and the outer edge of the insulation sealing structure is 0-0.5 mm. According to the shell assembly disclosed by the embodiment of the invention, the capacity of the shell can be improved on the basis of not increasing the size of the shell, so that a battery cell with a larger size can be accommodated, and the energy density of the battery is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a shell assembly and a battery having the same. Background Art

[0002] With the increasing development of electronic products, electronic products tend to be more miniaturized, which puts higher requirements on the size of batteries in battery products.

[0003] The battery in the related art generally includes a shell, a pole assembly and a battery cell. The pole assembly includes a portion located inside the shell, which will occupy too much space inside the shell and reduce the size of the battery cell that can be accommodated by the shell. Summary of the Invention

[0004] The embodiments of the present invention provide a housing assembly and a battery to solve the problem in the related art that the pole assembly occupies too much space in the housing, thereby increasing the size of the battery cell that can be accommodated by the housing.

[0005] The housing assembly of the embodiment of the present invention includes: a housing, wherein the housing has a receiving cavity; A pole, the pole comprising a first column, a second column and a third column, the first column being located outside the accommodating cavity, the second column being located inside the accommodating cavity, the third column (403) being passed through a through hole located in the shell, and the third column connecting the first column and the second column; an insulating sealing structure, the insulating sealing structure being provided between the third column and the housing, and the insulating sealing structure being provided between the first column and the housing, and between the second column and the housing, the insulating sealing structure being in interference fit with the outer peripheral surface of the third column; The projection of the outer edge of the second column in the direction of the insulating sealing structure is located on the insulating sealing structure, and the distance between the outer edge of the second column and the outer edge of the insulating sealing structure is 0-0.5 mm.

[0006] The shell assembly of the embodiment of the present invention can, by interference fitting the insulating sealing structure with the third column, on the one hand, make the third column and the insulating sealing structure fit tightly, reduce the volume of the pole assembly, and thus reduce the space occupied by the pole assembly inside the battery cell; on the other hand, after the third pole is installed in the insulating sealing structure, it can be automatically positioned under the action of the insulating sealing structure, which can reduce the occurrence of installation errors and also improve the assembly efficiency of the pole assembly, thereby improving the assembly efficiency of the shell assembly of the embodiment of the present invention.

[0007] Therefore, the housing assembly of the embodiment of the present invention can increase the capacity of the housing without increasing the size of the housing to accommodate larger-sized battery cells, thereby improving the energy density of the battery.

[0008] Optionally, the housing assembly further includes a pressure ring, The pressure ring is arranged between the first column and the insulating sealing structure, and a side of the pressure ring facing away from the first column abuts against the insulating sealing structure; or The pressure ring is arranged between the second column and the insulating sealing structure, and a side of the pressure ring facing away from the second column abuts against the insulating sealing structure; The projection of the outer edge of the pressure ring in the direction of the insulating sealing structure is located on the insulating sealing structure, and the distance between the outer edge of the pressure ring and the outer edge of the insulating sealing structure is 0-0.5 mm.

[0009] Optionally, the insulating sealing structure includes an insulating gasket and a sealing gasket. When the pressure ring is provided between the first column and the insulating sealing structure, the sealing gasket is located between the housing and the second column, one end face of the insulating gasket in the thickness direction abuts against the sealing gasket, and the other end face of the insulating gasket in the thickness direction abuts against the pressure ring; or, When the pressure ring is arranged between the second column and the insulating sealing structure, the sealing gasket is located between the shell and the pressure ring, one end face of the insulating gasket in the thickness direction is against the sealing gasket, and the other end face of the insulating gasket in the thickness direction is against the first column.

[0010] Optionally, the material of the insulating gasket includes at least one of PPS, PP, PET and PBT.

[0011] Optionally, the material of the sealing gasket includes at least one of PFA, fluororubber and PPS soft material.

[0012] Optionally, the insulating spacer includes a first insulating sheet and a second insulating sheet connected to each other. The first insulating sheet is provided between the outer periphery of the third column and the housing; The second insulating sheet is provided on a side of the shell away from the accommodating cavity, and the second insulating sheet abuts against the shell; The projection of the outer edge of the first insulating sheet in the direction of the second insulating sheet is located on the second insulating sheet, and the distance between the projection and the outer edge of the second insulating sheet is 0.3-1.5 mm.

[0013] Optionally, the first insulating sheet is a circular insulating sheet, and the outer diameter of the first insulating sheet is 1.5-6 mm; the second insulating sheet is a circular insulating sheet, and the outer diameter of the second insulating sheet is 0.9-3.0 mm; or The first insulating sheet is a square insulating sheet, and the side length of the first insulating sheet is 1.5-6 mm; the second insulating sheet is a square insulating sheet, and the side length of the second insulating sheet is 0.9-3.0 mm.

[0014] Optionally, a first accommodating groove is provided on a side of the first insulating sheet away from the accommodating cavity. The first receiving groove is used to receive at least a portion of the first column, and a groove wall of the first receiving groove is interference-fitted with the first column; or The first accommodating groove is used to accommodate at least a portion of the pressure ring, and the groove wall of the first accommodating groove is interference fit with the pressure ring.

[0015] Optionally, a second accommodating groove is provided on a side of the sealing gasket facing the accommodating cavity. The second accommodating groove is used to accommodate at least a portion of the pressure ring, and the groove wall of the second accommodating groove is interference fit with the pressure ring; or The second accommodating groove is used to accommodate at least a portion of the second column, and a groove wall of the second accommodating groove is interference-fitted with the second column.

[0016] Optionally, the sealing gasket is a circular gasket, and the outer diameter of the sealing gasket is 1.5-6 mm; The second column is a cylinder, and the diameter of the second column is 1.5-5 mm; The pressure ring is a circular ring, and the outer diameter of the pressure ring is 1.5-5 mm.

[0017] or, The sealing gasket is a square gasket with a side length of 1.5~6mm; the cross-section of the second cylinder is square with a side length of 1.5~6mm; the pressure ring is square with a side length of 1.5~6mm.

[0018] Optionally, an isolating member is provided on the sealing gasket, and the isolating member is spaced between the second column and the bottom of the accommodating cavity; and the isolating member has a protective portion extending out of the end of the second column away from the second column, and the protective portion is used to space the tab connected to the second column and the bottom of the accommodating cavity.

[0019] The isolation member is arranged on the side of the sealing gasket close to the bottom of the accommodating cavity; the isolation member includes an isolation portion and a connecting portion, and the isolation portion is spaced apart from the bottom of the accommodating cavity; the projection of the second column in the direction of the isolation portion is located on the isolation portion, and a distance is formed between the second column and the end of the isolation portion away from the through hole; the protective portion is arranged on the isolation portion; the connecting portion is arranged at the end of the isolation portion close to the through hole, and the connecting portion is fixedly connected to the sealing gasket.

[0020] The present invention also provides a battery.

[0021] The battery according to the embodiment of the present invention includes the housing assembly as described in the above embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 is a structural schematic diagram of a housing assembly according to an embodiment of the present invention; Figure 2 is a cross-sectional view of a housing assembly according to an embodiment of the present invention; Figure 3 yes Figure 2 A partial enlarged view of part A in the middle; Figure 4 is a structural schematic diagram of a housing assembly according to another embodiment of the present invention; Figure 5 is a cross-sectional view of a housing assembly according to another embodiment of the present invention; Figure 6 yes Figure 5 A partial enlarged view of part B in the middle.

[0024] In the picture: 100. Shell assembly; 1. Shell; 101. Accommodating cavity; 102. Upper cover; 103. Lower shell; 2. Through hole; 3. Pressing ring; 4. Pole; 401. First column; 402. Second column; 403. Third column; 5. Insulation and sealing structure; 501, insulating gasket; 5011, first insulating sheet; 5012, second insulating sheet; 50121, first receiving groove; 502, sealing gasket; 5021, second receiving groove; 6. Isolation piece; 601. Isolation portion; 602. Connecting portion. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] In the description of the present invention, it should be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary, such as by glue injection between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0028] In order to solve the problem in the related art that the pole 4 assembly occupies too much space in the shell 1, the battery capacity is increased under the premise of a certain size of the shell 1.

[0029] The present invention provides a housing assembly 100, The housing assembly 100 according to the embodiment of the present invention includes a housing 1 , a pole 4 and an insulating sealing structure 5 .

[0030] The housing 1 has a receiving cavity 101; The pole 4 includes a first column 401, a second column 402 and a third column 403. The first column 401 is located outside the accommodating cavity 101, the second column 402 is located inside the accommodating cavity 101, and the third column 403 is inserted into the through hole 104 of the shell 1, and the third column 403 connects the first column 401 and the second column 402.

[0031] The insulating sealing structure 5 is provided between the third column 403 and the housing 1, and an insulating sealing structure 5 is provided between the first column 401 and the housing 1, and between the second column 402 and the housing 1. The insulating sealing structure 5 is interference fit with the outer circumference of the third column 403; The projection of the outer edge of the second column 402 in the direction of the insulating sealing structure 5 is located on the insulating sealing structure 5, and the spacing between the outer edge of the insulating sealing structure 5 is 0~0.5mm, which can ensure that the second column 402 is insulated from the shell 1, and can also avoid the outer dimensions of the insulating sealing structure being too large, affecting or interfering with the welding of the shell and the upper cover and the outer dimensions exceeding the thickness of the shell.

[0032] The shell assembly 100 of the embodiment of the present invention can, by interference fitting the insulating sealing structure 5 with the third column 403, on the one hand, make the third column 403 and the insulating sealing structure 5 fit tightly, reduce the volume of the pole 4 assembly, and thus reduce the space occupied by the pole 4 assembly inside the battery cell; on the other hand, after the third pole 4 is installed in the insulating sealing structure 5, it can be automatically positioned under the action of the insulating sealing structure 5, which can reduce the occurrence of installation errors and also improve the assembly efficiency of the pole 4 assembly, thereby improving the assembly efficiency of the shell assembly 100 of the embodiment of the present invention, thereby reducing manufacturing costs.

[0033] Therefore, the housing assembly 100 of the embodiment of the present invention can increase the capacity of the housing 1 without increasing the size of the housing 1 to accommodate larger-sized battery cells, thereby improving the energy density of the battery.

[0034] The following is combined with Figure 1-6 The housing assembly 100 according to the embodiment of the present invention is further described.

[0035] like Figure 1 and 4 As shown, the housing assembly 100 according to the embodiment of the present invention includes a housing 1 , a pole 4 and an insulating sealing structure 5 .

[0036] The housing 1 has a receiving cavity 101, such as Figure 1 and 4 As shown, the housing 1 includes an upper cover 102 and a lower shell 103. The upper cover 102 is arranged on the lower shell 103 to define a receiving cavity 101. The receiving cavity 101 can be used to accommodate the battery cell and the electrolyte. The pole 4 includes a first column 401 , a second column 402 and a third column 403 . The first column 401 is located outside the accommodating cavity 101 , the second column 402 is located inside the accommodating cavity 101 , and the third column 403 passes through the shell 1 and connects the first column 401 and the second column 402 .

[0037] It can be understood that, in order to facilitate the third column 403 to pass through the housing 1 , a through hole 2 for the third column 403 to pass through is provided on the housing 1 .

[0038] The insulating sealing structure 5 is provided between the third column 403 and the housing 1 , and the insulating sealing structure 5 is provided between the first column 401 and the housing 1 and between the second column 402 and the housing 1 . It can be understood that the housing assembly 100 of the embodiment of the present invention can improve the insulation performance and sealing performance between the pole 4 and the housing 1 by arranging the insulating sealing structure 5 between the pole 4 and the housing 1 .

[0039] At the same time, the insulating sealing structure 5 is interference-fitted with the outer peripheral surface of the third column 403. On the one hand, the third column 403 and the insulating sealing structure 5 can be closely matched, reducing the volume of the pole 4 assembly, thereby reducing the space occupied by the pole 4 assembly inside the battery cell; On the other hand, after the third pole 4 is installed in the insulating sealing structure 5, it can be automatically positioned under the action of the insulating sealing structure 5, which can reduce the occurrence of installation errors and also improve the assembly efficiency of the pole 4 component, thereby improving the assembly efficiency of the shell assembly 100 of the embodiment of the present invention.

[0040] Furthermore, the projection of the outer edge of the second column 402 in the direction of the insulating sealing structure 5 is located on the insulating sealing structure 5, and the distance between the outer edge of the insulating sealing structure 5 is 0~0.5mm, which can not only ensure the insulation between the pressure ring and the shell, but also avoid the insulating sealing structure from being too large in size, affecting or interfering with the welding of the shell and the upper cover and the outer size exceeding the thickness of the shell.

[0041] Preferably, the projection of the outer edge of the second column 402 in the direction of the insulating sealing structure is located on the insulating sealing structure, and the distance between the outer edge of the insulating sealing structure 5 and the outer edge is 0 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm.

[0042] In some embodiments, the housing assembly 100 further includes a pressure ring 3 .

[0043] Alternatively, as Figure 3 As shown, the pressure ring 3 is arranged between the first column 401 and the insulating sealing structure 5, and the side of the pressure ring 3 facing away from the first column 401 abuts against the insulating sealing structure 5; that is, one side of the pressure ring 3 in the thickness direction abuts against the insulating sealing structure 5, and the other side abuts against the first column 401.

[0044] Optional, such as Figure 6As shown, the pressure ring 3 is arranged between the second column 402 and the insulating sealing structure 5, and the side of the pressure ring 3 facing away from the second column 402 abuts against the insulating sealing structure 5; that is, one side of the pressure ring 3 in the thickness direction abuts against the insulating sealing structure 5, and the other side abuts against the second column 402.

[0045] Furthermore, the projection of the outer edge of the pressure ring 3 in the direction of the insulating sealing structure 5 is located on the insulating sealing structure 5, and the spacing between the outer edge of the insulating sealing structure 5 is 0~0.5mm, which can not only ensure the insulation between the pressure ring 3 and the shell 1, but also avoid the insulating sealing structure 5 from being too large in size, affecting or interfering with the welding of the shell and the upper cover and the size exceeding the thickness of the shell.

[0046] Preferably, the projection of the outer edge of the ring 3 in the direction of the insulating sealing structure 5 is located on the insulating sealing structure 5, and the distance between the outer edge of the ring 3 and the insulating sealing structure 5 is 0 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm.

[0047] In some embodiments, the insulating sealing structure 5 includes an insulating gasket 501 and a sealing gasket 502 .

[0048] By configuring the insulating sealing structure 5 to include an insulating gasket 501 and a sealing gasket 502 , that is, configuring the insulating sealing structure 5 to be a split structure with two separate parts, the insulating sealing structure 5 can be easily assembled, reducing the difficulty of assembling the insulating sealing structure 5 .

[0049] When the pressure ring 3 is provided between the first column 401 and the insulating sealing structure 5, the sealing gasket 502 is located between the housing 1 and the second column 402, and one end surface of the insulating gasket 501 in the thickness direction abuts against the sealing gasket 502, and the other end surface of the insulating gasket 501 in the thickness direction abuts against the pressure ring 3; or, When the pressure ring 3 is arranged between the second column 402 and the insulating sealing structure 5, the sealing gasket 502 is located between the shell 1 and the pressure ring 3, and one end face of the insulating gasket 501 in the thickness direction is against the sealing gasket 502, and the other end face of the insulating gasket 501 in the thickness direction is against the first column 401.

[0050] In some embodiments, the material of the insulating spacer 501 includes at least one of PPS, PP, PET, and PBT.

[0051] It can be understood that when the elongation and yield elongation of the material used are small, and the yield strength and elastic modulus are relatively large, the compression rate is 10%~20%; In some embodiments, the material of the sealing gasket 502 includes at least one of PFA, fluororubber, and PPS soft material.

[0052] It can be understood that when the elongation and yield elongation of the material used for the sealing gasket are large, and the yield strength and elastic modulus are relatively small, the compression amount is 20%~40%; At the same time, PFA, fluororubber and PPS soft materials have good corrosion resistance and high temperature resistance. When the temperature rise of laser welding between the shell and the upper cover is high, PFA, fluororubber and PPS soft materials will not soften or melt to affect the sealing performance.

[0053] In some embodiments, the insulating gasket 501 includes a first insulating sheet 5011 and a second insulating sheet 5012 connected to each other, and the first insulating sheet 5011 is arranged between the outer periphery of the third column 403 and the shell 1; the second insulating sheet 5012 is arranged on the side of the shell 1 away from the accommodating cavity 101, and the second insulating sheet 5012 is abutted against the shell 1.

[0054] The first insulating sheet 5011 and the second insulating sheet 5012 are arranged as an integral whole, that is, the first insulating sheet 5011 is located in the through hole 2 of the shell 1 to isolate the outer periphery of the third column 403 and the shell 1, and the second insulating sheet 5012 is located on the side of the shell 1 away from the accommodating cavity 101 and is against the shell 1. At the same time, the outer diameter of the second insulating sheet 5012 is larger than the outer diameter of the first insulating sheet 5011.

[0055] By making the outer diameter of the second insulating sheet 5012 larger than the outer diameter of the first insulating sheet 5011 , the first column 401 and the housing 1 or the isolation pressure ring 3 and the housing 1 can be further isolated.

[0056] The projection of the outer edge of the first insulating sheet 5011 in the direction of the second insulating sheet 5012 is located on the second insulating sheet 5012 , and the distance between the projection and the outer edge of the second insulating sheet 5012 is 0.3-1.5 mm.

[0057] Preferably, the projection of the outer edge of the first insulating sheet 5011 in the direction of the second insulating sheet 5012 is located on the second insulating sheet 5012, and the distance between the outer edge of the first insulating sheet 5011 and the outer edge of the second insulating sheet 5012 is 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm or 1.5 mm.

[0058] In some embodiments, the first insulating sheet is a circular insulating sheet, and the outer diameter of the first insulating sheet 5011 is 1.5-6 mm; the outer diameter of the second insulating sheet 5012 is 0.9-3.0 mm.

[0059] Preferably, the outer diameter of the first insulating sheet 5011 is 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4.0 mm, 4.1 mm, 4.2mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5.0 mm, 5.1 mm, 5.2 mm, 5.3mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm or 6.0 mm.

[0060] It can be understood that the outer diameter of the first insulating sheet 5011 can be determined according to actual needs.

[0061] Preferably, the second insulating sheet 5012 is a circular insulating sheet, and the outer diameter of the second insulating sheet 5012 is 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm or 3.0 mm.

[0062] It can be understood that the outer diameter of the second insulating sheet 5012 can be determined according to actual needs.

[0063] In some embodiments, the first insulating sheet 5011 is a square insulating sheet, and the side length of the first insulating sheet 5011 is 1.5-6 mm; the second insulating sheet 5012 is a square insulating sheet, and the side length of the second insulating sheet 5012 is 0.9-3.0 mm.

[0064] Preferably, the first insulating sheet 5011 is a square insulating sheet, and the side length of the first insulating sheet 5011 is 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4.0 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5.0 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm mm, 5.9 mm, or 6.0 mm.

[0065] Preferably, the second insulating sheet 5012 is a square insulating sheet, and the side length of the second insulating sheet 5012 is 0.9 mm, 1.0 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm or 3.0 mm.

[0066] It is understood that the values ​​of the first insulating sheet and the second insulating sheet should follow the principle of adaptation. For example, when the outer diameter of the first insulating sheet is relatively small, the outer diameter of the second insulating sheet should also be relatively small. When the outer diameter of the first insulating sheet is relatively large, the outer diameter of the second insulating sheet should also be relatively large.

[0067] In some embodiments, a first accommodating groove 50121 is provided on the side of the second insulating sheet 5012 away from the accommodating cavity 101, and the first accommodating groove 50121 is used to accommodate at least part of the first column 401; that is, the first accommodating groove 50121 can accommodate part of the first column 401, or it can accommodate all of the first column 401, that is, the depth of the first accommodating groove 50121 is less than or equal to the thickness of the first column 401.

[0068] The groove wall of the first receiving groove 50121 is interference fit with the first column 401; By interference fitting the groove wall of the first receiving groove 50121 with the second column 402, the inner wall of the first receiving groove 50121 is abutted against the outer wall of the first column 401, so that the first receiving groove 50121 can limit the first column 401 and prevent the first column 401 from being displaced in the first receiving groove 50121.

[0069] Correspondingly, a second accommodating groove 5021 is provided on the side of the sealing gasket 502 facing the accommodating cavity 101. The second accommodating groove 5021 is used to accommodate at least part of the pressure ring 3. That is, the second accommodating groove 5021 can accommodate part of the pressure ring 3 or all of the pressure ring 3. The depth of the first accommodating groove 50121 is less than or equal to the thickness of the pressure ring 3.

[0070] The groove wall of the second receiving groove 5021 is interference fit with the pressure ring 3; By interference fitting the groove wall of the second accommodating groove 5021 with the pressure ring 3, the inner wall of the second accommodating groove 5021 is abutted against the outer wall of the pressure ring 3, so that the second accommodating groove 5021 can limit the pressure ring 3 and avoid the pressure ring 3 from being misplaced in the first accommodating groove 50121.

[0071] In some embodiments, the first accommodating groove 50121 is used to accommodate at least part of the pressure ring 3, that is, the first accommodating groove 50121 can accommodate part of the pressure ring 3, and can also accommodate all of the pressure ring 3, that is, the depth of the first accommodating groove 50121 is less than or equal to the pressure ring 3.

[0072] The groove wall of the first accommodating groove 50121 is interference fit with the pressure ring 3.

[0073] By interference fitting the groove wall of the first accommodating groove 50121 with the pressure ring 3, the inner circumferential wall of the first accommodating groove 50121 is abutted against the outer circumferential wall of the pressure ring 3, so that the first accommodating groove 50121 can limit the pressure ring 3 and avoid dislocation of the pressure ring 3 in the first accommodating groove 50121.

[0074] Correspondingly, the second accommodating groove 5021 is used to accommodate at least part of the second column 402, that is, the second accommodating groove 5021 can accommodate part of the second column 402 or the entire second column 402, and the depth of the first accommodating groove 50121 is less than or equal to the thickness of the second column 402.

[0075] The groove wall of the second receiving groove 5021 is interference fit with the second column 402 .

[0076] By interference fitting the groove wall of the second receiving groove 5021 with the second column 402, the inner wall of the second receiving groove 5021 is abutted against the outer wall of the second column 402, so that the second receiving groove 5021 can limit the second column 402 and avoid the second column 402 from being misplaced in the first receiving groove 50121.

[0077] In some embodiments, the sealing gasket 502 is a circular gasket, and the outer diameter of the sealing gasket 502 is 1.5-6 mm; Preferably, the outer diameter of the sealing gasket 502 is 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4.0 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5.0 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm, 6.0 mm.

[0078] The second column 402 is a cylinder, and the diameter of the second column 402 is 1.5-5 mm; Preferably, the diameter of the second cylinder 402 is 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4.0 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5.0 mm.

[0079] The pressing ring 3 is a circular ring, and the outer diameter of the pressing ring 3 is 1.5-5 mm.

[0080] Preferably, the outer diameter of the pressure ring 3 is 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4.0 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5.0 mm.

[0081] In some embodiments, the sealing gasket is a square gasket, and the side length of the sealing gasket is 1.5 to 6 mm; Preferably, the side length of the sealing gasket is 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4.0 mm, 4.1 mm, 4.2 mm, 4.3mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5.0 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm, 6.0 mm.

[0082] The cross section of the second cylinder is square, and the side length of the cross section of the second cylinder is 1.5-6 mm; Preferably, the side length of the cross section of the second column is 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4.0 mm, 4.1 mm, 4.2mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5.0 mm, 5.1 mm, 5.2 mm, 5.3mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm, 6.0 mm.

[0083] The pressure ring is a square ring with a side length of 1.5~6mm.

[0084] Preferably, the pressure ring is a square ring, and the side length of the pressure ring is 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, 2.8 mm, 2.9 mm, 3.0 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, 4.0 mm, 4.1 mm, 4.2 mm, 4.3 mm, 4.4 mm, 4.5 mm, 4.6 mm, 4.7 mm, 4.8 mm, 4.9 mm, 5.0 mm, 5.1 mm, 5.2 mm, 5.3 mm, 5.4 mm, 5.5 mm, 5.6 mm, 5.7 mm, 5.8 mm, 5.9 mm, 6.0 mm.

[0085] It is understood that the outer diameters of the sealing gasket, the pressure ring, and the second column should be adapted to each other. For example, if the outer diameter of the sealing gasket is relatively small, the outer diameter of the pressure ring should also be relatively small; if the outer diameter of the sealing gasket is relatively large, the outer diameter of the pressure ring should also be relatively large.

[0086] In some embodiments, an isolation member 6 is provided on the sealing gasket 502, and the isolation member 6 is separated between the second column 402 and the bottom of the accommodating cavity 101; and the isolation member 6 has a protective portion extending out of the end of the second column 402 away from the second column 403, and the protective portion is used to separate the pole ear connected to the second column 402 and the bottom of the accommodating cavity 101.

[0087] The shell assembly 100 of the embodiment of the present invention can prevent the second column 402 from contacting the bottom of the accommodating cavity 101 by providing an isolation member 6, and can also prevent the pole ear connected to the second column 402 on the battery cell from contacting the bottom of the accommodating cavity 101, that is, it can prevent the second column 402, the pole ear connected to the second column 402 from contacting the shell 1 to cause a battery short circuit, thereby improving the safety performance of the battery.

[0088] In some embodiments, the isolating member 6 is disposed on a side of the sealing gasket 502 close to the bottom of the accommodating cavity 101; the isolating member 6 includes an isolating portion 601 and a connecting portion 602, the isolating portion 601 being spaced apart from the bottom of the accommodating cavity 101; the projection of the second column 402 in the direction of the isolating portion 601 is located on the isolating portion 601, and a gap is formed between the second column 402 and the end of the isolating portion 601 away from the through hole 104; the protective portion is disposed on the isolating portion 601; The connecting portion 602 is disposed at one end of the isolation portion 601 close to the through hole 104 , and the connecting portion 602 is fixedly connected to the sealing gasket 502 .

[0089] It can be understood that the isolating member 6 has a simple structure, simplifies processing, and ensures the reliability of the spacing between the second column 402, the tab and the shell 1, thereby preventing the tab from contacting the shell and causing a short circuit in the battery.

[0090] The housing assembly according to the embodiment of the present invention is further described below.

[0091] The housing assembly of the embodiment of the present invention includes a housing, a pole, and an insulating sealing structure.

[0092] The shell 1 has a accommodating cavity 101; the pole 4 includes a first cylinder 401, a second cylinder 402 and a third cylinder 403, the first cylinder 401 is located outside the accommodating cavity 101, the second cylinder 402 is located inside the accommodating cavity 101, the third cylinder 403 is passed through the shell 1, and the third cylinder 403 connects the first cylinder 401 and the second cylinder 402; the insulating sealing structure 5 is arranged between the third cylinder 403 and the shell 1, between the first cylinder 401 and the shell 1, and between the second cylinder 402 and the shell 1; the insulating sealing structure 5 is interference fit with the outer peripheral surface of the third cylinder 403; the projection of the outer edge of the second cylinder 402 in the direction of the insulating sealing structure 5 is located on the insulating sealing structure 5, and the distance between the outer edge of the insulating sealing structure 5 and the outer edge of the insulating sealing structure 5 is 0 mm.

[0093] The housing assembly 100 further includes a pressure ring 3, which is disposed between the first column 401 and the insulating sealing structure 5, with a surface of the pressure ring 3 facing away from the first column 401 abutting against the insulating sealing structure 5; The projection of the outer edge of the pressure ring 3 in the direction of the insulating sealing structure 5 is located on the insulating sealing structure 5 , and the distance between the outer edge of the pressure ring 3 and the insulating sealing structure 5 is 0 mm.

[0094] By arranging the outer edges of the second column 402 and the pressure ring 3 to be flush with the outer edges of the insulating sealing structure 5, the sealing and insulating performance between the pole and the housing can be improved without increasing the volume of the pole and the insulating sealing structure.

[0095] The insulating sealing structure 5 includes an insulating gasket 501 and a sealing gasket 502; the sealing gasket 502 is located between the shell 1 and the second cylinder 402, and one end face of the insulating gasket 501 in the thickness direction is against the sealing gasket 502, and the other end face of the insulating gasket 501 in the thickness direction is against the pressure ring 3.

[0096] The insulating gasket 501 includes a first insulating sheet 5011 and a second insulating sheet 5012 connected to each other. The first insulating sheet 5011 is arranged between the outer periphery of the third column 403 and the shell 1; the second insulating sheet 5012 is arranged on the side of the shell 1 away from the accommodating cavity 101, and the second insulating sheet 5012 is abutted against the shell 1; the projection of the outer edge of the first insulating sheet 5011 in the direction of the second insulating sheet 5012 is located on the second insulating sheet 5012, and the distance between the outer edge of the first insulating sheet 5011 and the second insulating sheet 5012 is 0.3 mm.

[0097] The first insulating sheet 5011 is a circular insulating sheet, and the outer diameter of the first insulating sheet 5011 is 1.5 mm; the second insulating sheet 5012 is a circular insulating sheet, and the outer diameter of the second insulating sheet 5012 is 0.9 mm.

[0098] The first accommodating groove 50121 is used to accommodate at least a portion of the pressure ring 3 , and the groove wall of the first accommodating groove 50121 is interference fit with the pressure ring 3 .

[0099] A second receiving groove 5021 is provided on one side of the sealing gasket 502 facing the receiving cavity 101 . The second receiving groove 5021 is used to receive at least a portion of the second column 402 . The groove wall of the second receiving groove 5021 is interference fit with the second column 402 .

[0100] The sealing gasket 502 is a circular gasket, and the outer diameter of the sealing gasket 502 is 1.5 mm; The second column 402 is a cylinder, and the diameter of the second column 402 is 1.5 mm; The pressure ring 3 is a circular ring, and the outer diameter of the pressure ring 3 is 1.5 mm.

[0101] By setting the outer diameter of the second insulating sheet 5012, the outer diameter of the sealing gasket 502, the diameter of the second column 402 and the outer diameter of the pressure ring 3 to be the same, the sealing and insulating performance between the pole and the shell can be improved without increasing the volume of the pole and the insulating sealing structure.

[0102] An isolation member 6 is provided on the sealing gasket 502, and the isolation member 6 is spaced between the second column 402 and the bottom of the accommodating cavity 101; and the isolation member 6 has a protective portion extending out of the end of the second column 402 away from the second column 403, and the protective portion is used to separate the pole ear connected to the second column 402 and the bottom of the accommodating cavity 101.

[0103] The isolation member 6 is provided on one side of the sealing gasket 502 close to the bottom of the accommodating cavity 101; The isolating member 6 includes an isolating portion 601 and a connecting portion 602. The isolating portion 601 is spaced apart from the bottom of the accommodating cavity 101. The projection of the second column 402 in the direction of the isolating portion 601 is located on the isolating portion 601 and is spaced apart from the end of the isolating portion 601 away from the through hole 104. The protective portion is provided on the isolating portion 601. The connecting portion 602 is disposed at one end of the isolation portion 601 close to the through hole 104 , and the connecting portion 602 is fixedly connected to the sealing gasket 502 .

[0104] Insulating gasket 501 is made of at least one of the corrosion-resistant materials selected from PPS, PP, PET, and PBT. When the material has a relatively low elongation and yield elongation, but a relatively high yield strength and elastic modulus compared to fluororubber, the compression is 10% to 20%.

[0105] Sealing gasket 502 is made of at least one of PFA, fluororubber, and PPS. When the material has high elongation and yield elongation, and relatively high yield strength and elastic modulus, the compression is 20% to 40%. PFA, fluororubber, and PPS offer excellent corrosion resistance and high temperature resistance. When the laser welding temperature between the housing and the upper cover rises, PFA, fluororubber, and PPS will not soften or melt, thereby affecting the sealing performance.

[0106] The present invention also provides a battery.

[0107] The battery according to the embodiment of the present invention includes the housing assembly 100 according to the above embodiment.

[0108] The battery according to the embodiment of the present invention can improve the energy density of the battery by providing the housing assembly 100 according to the above embodiment.

[0109] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A housing assembly, characterized in that: include: A housing (1), the housing (1) having a receiving cavity (101); A pole (4), the pole (4) comprising a first column (401), a second column (402) and a third column (403), the first column (401) being located outside the accommodating cavity (101), the second column (402) being located inside the accommodating cavity (101), the third column (403) being passed through a through hole (104) located in the housing (1), and the third column (403) connecting the first column (401) and the second column (402); an insulating sealing structure (5), the insulating sealing structure (5) being arranged between the third column (403) and the shell (1), between the first column (401) and the shell (1), and between the second column (402) and the shell (1); the insulating sealing structure (5) is interference-fitted with the outer peripheral surface of the third column (403); The projection of the outer edge of the second column (402) in the direction of the insulating sealing structure (5) is located on the insulating sealing structure (5), and the distance between the projection and the outer edge of the insulating sealing structure (5) is 0-0.5 mm.

2. The housing assembly according to claim 1, wherein: The housing assembly (100) further comprises a pressure ring (3), The pressure ring (3) is provided between the first column (401) and the insulating sealing structure (5), and a side of the pressure ring (3) facing away from the first column (401) abuts against the insulating sealing structure (5); or The pressure ring (3) is arranged between the second column (402) and the insulating sealing structure (5), and a side of the pressure ring (3) facing away from the second column (402) abuts against the insulating sealing structure (5); The projection of the outer edge of the pressure ring (3) in the direction of the insulating sealing structure (5) is located on the insulating sealing structure (5), and the distance between the projection and the outer edge of the insulating sealing structure (5) is 0-0.5 mm.

3. The housing assembly according to claim 2, wherein: The insulating sealing structure (5) comprises an insulating gasket (501) and a sealing gasket (502); When the pressure ring (3) is provided between the first column (401) and the insulating sealing structure (5), the sealing gasket (502) is located between the housing (1) and the second column (402), one end face of the insulating gasket (501) in the thickness direction thereof abuts against the sealing gasket (502), and the other end face of the insulating gasket (501) in the thickness direction thereof abuts against the pressure ring (3); or, When the pressure ring (3) is arranged between the second column (402) and the insulating sealing structure (5), the sealing gasket (502) is located between the shell (1) and the pressure ring (3), and one end face of the insulating gasket (501) in the thickness direction thereof abuts against the sealing gasket (502), and the other end face of the insulating gasket (501) in the thickness direction thereof abuts against the first column (401).

4. The housing assembly according to claim 3, wherein: The material of the insulating gasket (501) includes at least one of PPS, PP, PET and PBT.

5. The housing assembly according to claim 3, wherein: The material of the sealing gasket (502) includes at least one of PFA, fluororubber and PPS soft material.

6. The housing assembly according to claim 3, wherein: The insulating gasket (501) comprises a first insulating sheet (5011) and a second insulating sheet (5012) connected to each other. The first insulating sheet (5011) is provided between the outer periphery of the third column (403) and the housing (1); The second insulating sheet (5012) is provided on a side of the shell (1) facing away from the accommodating cavity (101), and the second insulating sheet (5012) is in contact with the shell (1); The projection of the outer edge of the first insulating sheet (5011) in the direction of the second insulating sheet (5012) is located on the second insulating sheet (5012), and the distance between the projection and the outer edge of the second insulating sheet (5012) is 0.3-1.5 mm.

7. The housing assembly according to claim 6, wherein: The first insulating sheet (5011) is a circular insulating sheet, and the outer diameter of the first insulating sheet (5011) is 1.5-6 mm; the second insulating sheet (5012) is a circular insulating sheet, and the outer diameter of the second insulating sheet (5012) is 0.9-3.0 mm, or The first insulating sheet (5011) is a square insulating sheet, and the side length of the first insulating sheet (5011) is 1.5-6 mm; the second insulating sheet (5012) is a square insulating sheet, and the side length of the second insulating sheet (5012) is 0.9-3.0 mm.

8. The housing assembly according to claim 6, wherein: A first accommodating groove (50121) is provided on a side of the first insulating sheet (5011) away from the accommodating cavity (101). The first accommodating groove (50121) is used to accommodate at least a portion of the first column (401), and the groove wall of the first accommodating groove (50121) is interference-fitted with the first column (401); or The first accommodating groove (50121) is used to accommodate at least a portion of the pressure ring (3), and the groove wall of the first accommodating groove (50121) is interference-fitted with the pressure ring (3).

9. The housing assembly according to claim 3, wherein: A second accommodating groove (5021) is provided on a side of the sealing gasket (502) facing the accommodating cavity (101). The second accommodating groove (5021) is used to accommodate at least a portion of the pressure ring (3), and the groove wall of the second accommodating groove (5021) is interference-fitted with the pressure ring (3); or The second accommodating groove (5021) is used to accommodate at least a portion of the second column (402), and the groove wall of the second accommodating groove (5021) is interference-fitted with the second column (402).

10. The housing assembly according to claim 9, wherein: The sealing gasket (502) is a circular gasket, and the outer diameter of the sealing gasket (502) is 1.5-6 mm; The second column (402) is a cylinder, and the diameter of the second column (402) is 1.5-5 mm; The pressure ring (3) is a circular ring, and the outer diameter of the pressure ring (3) is 1.5-5 mm, or The sealing gasket is a square gasket, and the side length of the sealing gasket is 1.5-6 mm; The cross section of the second cylinder is square, and the side length of the cross section of the second cylinder is 1.5-6 mm; The pressure ring is a square ring, and the side length of the pressure ring is 1.5-6 mm.

11. The housing assembly according to any one of claims 3 to 10, characterized in that: An isolating member (6) is provided on the sealing gasket (502), and the isolating member (6) is spaced between the second column (402) and the bottom of the accommodating cavity (101); and the isolating member (6) has a protective portion extending out of the end of the second column (402) away from the second column (403), and the protective portion is used to space the tab connected to the second column (402) and the bottom of the accommodating cavity (101).

12. The housing assembly according to claim 11, wherein: The isolation member (6) is provided on a side of the sealing gasket (502) close to the bottom of the accommodating cavity (101); The isolating member (6) comprises an isolating portion (601) and a connecting portion (602), wherein the isolating portion (601) is spaced apart from the bottom of the accommodating cavity (101); a projection of the second column (402) in the direction of the isolating portion (601) is located on the isolating portion (601), and a distance is formed between the second column (402) and an end of the isolating portion (601) away from the through hole (104); the protective portion is provided on the isolating portion (601); The connecting portion (602) is provided at one end of the isolation portion (601) close to the through hole (104), and the connecting portion (602) is fixedly connected to the sealing gasket (502).

13. A battery, characterized in that: Comprising a housing assembly (100) according to any one of claims 1 to 12.

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