Housing assembly and battery having the same

Abstract

The application provides a shell assembly and a battery with the same, the shell assembly comprising a shell, a pole and an insulation sealing structure. The shell has a receiving 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 receiving cavity, the second pole body is located inside the receiving cavity, and the third pole body is arranged through the shell and connected with the first pole body and the second pole body. The insulation sealing structure is arranged between the third pole body and the shell, and the insulation sealing structure is arranged between the first pole body and the shell and between the second pole body and the shell, and the insulation sealing structure is in interference fit with the outer circumferential surface of the third pole body; the projection of the outer edge of the second pole body on the insulation sealing structure is located on the insulation sealing structure, and the spacing between the outer edge of the insulation sealing structure and the outer edge of the second pole body is 0-0.5 mm. The shell assembly of the embodiment of the application can improve the capacity of the shell without increasing the size of the shell, so as to accommodate a larger size battery cell, and further improve the energy density of the battery.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more particularly to a housing assembly and a battery having the same. Background Technology

[0002] With the increasing development of electronic products, they are becoming smaller, which places higher demands on the size of batteries in battery products.

[0003] Batteries in related technologies typically include a casing, terminal assembly, and battery cell. The terminal assembly includes a portion located inside the casing, which takes up too much space inside the casing, reducing the size of the battery cell that the casing can accommodate. Summary of the Invention

[0004] This invention provides a housing assembly and a battery to solve the problem of excessive space occupied by the terminal assembly in the housing in related technologies, thereby increasing the size of the battery cell that the housing can accommodate.

[0005] The housing assembly of this invention includes: A housing having a receiving cavity; The pole post includes a first post, a second post and a third post, the first post being located outside the receiving cavity, the second post being located inside the receiving cavity, and the third post (403) being inserted into a through hole in the housing, and the third post connecting the first post and the second post; An insulating sealing structure is provided between the third column and the housing, and the insulating sealing structure is also provided between the first column and the housing, and between the second column and the housing. The insulating sealing structure is interference-fitted 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 second column and the outer edge of the insulating sealing structure is 0~0.5mm.

[0006] In this embodiment of the invention, the housing assembly uses an interference fit between the insulating sealing structure and the third post. On the one hand, this allows the third post and the insulating sealing structure to fit tightly, reducing the volume of the terminal assembly and thus reducing the space occupied by the terminal assembly inside the battery cell. On the other hand, after the third post is installed in the insulating sealing structure, it can be automatically positioned under the action of the insulating sealing structure, reducing installation errors and improving the assembly efficiency of the terminal assembly, thereby improving the assembly efficiency of the housing assembly in this embodiment of the invention.

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

[0008] Optionally, the housing assembly further includes a pressure ring. The pressure ring is disposed between the first column and the insulating sealing structure, and the side of the pressure ring facing away from the first column abuts against the insulating sealing structure; or The pressure ring is disposed between the second column and the insulating sealing structure, and the 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 pressure ring and the outer edge of the insulating sealing structure is 0~0.5mm.

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

[0010] Optionally, the insulating pad is made of 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 pad includes a first insulating sheet and a second insulating sheet connected together. The first insulating sheet is disposed between the outer periphery of the third column and the housing; The second insulating sheet is disposed on the side of the housing opposite to the receiving cavity, and the second insulating sheet abuts against the housing; The projection of the outer edge of the first insulating sheet onto the second insulating sheet in the direction of the second insulating sheet is located on the second insulating sheet, and the distance between the first insulating sheet and the outer edge of the second insulating sheet is 0.3~1.5mm.

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

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

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

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

[0017] or, The sealing gasket is a square gasket with a side length of 1.5~6mm; the cross-section of the second column 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, the sealing gasket is provided with an isolation member, which is spaced between the second column and the bottom of the receiving cavity; and the isolation member has a protective portion extending out of the end of the second column away from the second column, which is used to spacedly connect the tab of the second column and the bottom of the receiving cavity.

[0019] The isolation member is disposed on the side of the sealing gasket near the bottom of the receiving cavity; the isolation member includes an isolation portion and a connecting portion, the isolation portion being spaced apart from the bottom of the receiving cavity; the projection of the second column in the direction of the isolation portion is located on the isolation portion, and a gap is formed between it and the end of the isolation portion away from the through hole; the protective portion is disposed on the isolation portion; the connecting portion is disposed at the end of the isolation portion near 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 of this invention includes the housing assembly as described in the above embodiments. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0024] In the picture: 100. Housing assembly; 1. Shell; 101. Receiving cavity; 102. Upper cover; 103. Lower shell; 2. Through hole; 3. Pressure ring; 4. Pole post; 401. First column; 402. Second column; 403. Third column; 5. Insulated and sealed 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 component; 601. Isolation part; 602. Connecting part. Detailed Implementation

[0025] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0026] In the description of this invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal encapsulation of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] In order to solve the problem that the terminal post 4 component occupies too much space inside the housing 1 in related technologies, and to improve the battery capacity under the premise that the size of the housing 1 is fixed.

[0029] This invention provides a housing assembly 100, The housing assembly 100 of this invention includes a housing 1, a pole post 4, and an insulating and sealing structure 5.

[0030] The housing 1 has a receiving cavity 101; The pole post 4 includes a first post 401, a second post 402 and a third post 403. The first post 401 is located outside the receiving cavity 101, the second post 402 is located inside the receiving cavity 101, and the third post 403 passes through the through hole 2 located in the housing 1, and the third post 403 connects the first post 401 and the second post 402.

[0031] An 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-fitted with the outer peripheral surface of the third column 403. The projection of the outer edge of the second column 402 onto the insulating sealing structure 5 is located on the insulating sealing structure 5, and the distance between the second column 402 and the outer edge of the insulating sealing structure 5 is 0~0.5mm. This ensures that the second column 402 is insulated from the housing 1, and also avoids the insulating sealing structure from being too large, affecting or interfering with the welding of the housing and the top cover, and the outer dimensions exceeding the thickness of the housing.

[0032] In this embodiment of the invention, the housing assembly 100 uses an interference fit between the insulating sealing structure 5 and the third column 403. On the one hand, this allows the third column 403 and the insulating sealing structure 5 to fit tightly, reducing the volume of the electrode post 4 assembly and thus reducing the space occupied by the electrode post 4 assembly inside the battery cell. On the other hand, after the third column 403 is installed in the insulating sealing structure 5, it can be automatically positioned under the action of the insulating sealing structure 5, reducing the occurrence of installation errors and improving the assembly efficiency of the electrode post 4 assembly. This, in turn, improves the assembly efficiency of the housing assembly 100 in this embodiment of the invention, thereby reducing manufacturing costs.

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

[0034] The following is in conjunction with the appendix Figure 1-6 The housing assembly 100 of an embodiment of the present invention will be further described.

[0035] like Figure 1 and 4 As shown, the housing assembly 100 of this embodiment of the invention includes a housing 1, a pole post 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 cover 103. The upper cover 102 covers the lower cover 103 and defines a receiving cavity 101, which can be used to accommodate the battery cell and electrolyte. The pole post 4 includes a first post 401, a second post 402 and a third post 403. The first post 401 is located outside the receiving cavity 101, the second post 402 is located inside the receiving cavity 101, and the third post 403 passes through the housing 1 and connects the first post 401 and the second post 402.

[0037] It is understandable that, in order to facilitate the passage of the third column 403 through the housing 1, the housing 1 is provided with a through hole 2 for the third column 403 to pass through.

[0038] An insulating sealing structure 5 is disposed between the third column 403 and the housing 1, and insulating sealing structures 5 are also disposed between the first column 401 and the housing 1, and between the second column 402 and the housing 1. It is understood that the housing assembly 100 of the present invention can improve the insulation and sealing performance between the pole post 4 and the housing 1 by providing the insulating sealing structure 5 between the pole post 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, it enables the third column 403 and the insulating sealing structure 5 to fit tightly together, reducing the volume of the pole post 4 assembly, and thus reducing the space occupied by the pole post 4 assembly inside the cell. On the other hand, after the third column 403 is installed on the insulating and sealing structure 5, it can be automatically positioned under the action of the insulating and sealing structure 5, which can reduce the generation of installation errors and improve the assembly efficiency of the pole column 4 assembly, thereby improving the assembly efficiency of the housing assembly 100 in this embodiment of the invention.

[0040] Furthermore, the projection of the outer edge of the second column 402 onto the insulating sealing structure 5 is located on the insulating sealing structure 5, and the distance between it and the outer edge of the insulating sealing structure 5 is 0~0.5mm. This ensures that the pressure ring is insulated from the shell, and also avoids the insulating sealing structure from being too large, affecting or interfering with the welding of the shell and the top cover, and the outer dimensions 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 it and the outer edge of the insulating sealing structure 5 is 0mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm or 0.5mm.

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

[0043] Optionally, such as Figure 3 As shown, the pressure ring 3 is disposed between the first column 401 and the insulating sealing structure 5. 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 disposed between the second column 402 and the insulating sealing structure 5. 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 onto the insulating sealing structure 5 is located on the insulating sealing structure 5, and the distance between the pressure ring 3 and the outer edge of the insulating sealing structure 5 is 0~0.5mm. This ensures that the pressure ring 3 is insulated from the housing 1, and also avoids the insulating sealing structure 5 from being too large, affecting or interfering with the welding of the housing and the top cover, and preventing the outer dimensions from exceeding the thickness of the housing.

[0046] Preferably, the projection of the outer edge of the pressure ring 3 onto the insulating sealing structure 5 is located on the insulating sealing structure 5, and the distance between the pressure ring 3 and the outer edge of 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, by configuring the insulating sealing structure 5 as a separate structure with two separate parts, it is easier to assemble the insulating sealing structure 5 and reduce the assembly difficulty of the insulating sealing structure 5.

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

[0050] In some embodiments, the insulating pad 501 is made of at least one of PPS, PP, PET and PBT.

[0051] It is understandable that when the material used has a small elongation and yield elongation, but a relatively large yield strength and elastic modulus, the compression rate is 10% to 20%. In some embodiments, the material of the sealing gasket 502 includes at least one of PFA, fluororubber, and PPS soft material.

[0052] It is understandable that when the elongation and yield elongation of the material used for the gasket are relatively large, and the yield strength and elastic modulus are relatively small, the compression is 20% to 40%. Meanwhile, PFA, fluororubber, and PPS soft materials have good corrosion resistance and high temperature resistance. When the temperature rise is high during laser welding of the shell and the top cover, PFA, fluororubber, and PPS soft materials will not soften or melt and thus affect the sealing performance.

[0053] In some embodiments, the insulating pad 501 includes a first insulating sheet 5011 and a second insulating sheet 5012 connected together. The first insulating sheet 5011 is disposed between the outer periphery of the third column 403 and the housing 1. The second insulating sheet 5012 is disposed on the side of the housing 1 away from the receiving cavity 101 and abuts against the housing 1.

[0054] The first insulating sheet 5011 and the second insulating sheet 5012 are integrally formed. That is, the first insulating sheet 5011 is located in the through hole 2 of the housing 1 to isolate the outer periphery of the third column 403 from the housing 1, and the second insulating sheet 5012 is located on the side of the housing 1 away from the receiving cavity 101 and abuts against the housing 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, it is possible to further isolate the first column 401 from the housing 1 or the isolation pressure ring 3 from the housing 1.

[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 first insulating sheet 5011 and the outer edge of the second insulating sheet 5012 is 0.3~1.5mm.

[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 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, the outer diameter of the first insulating sheet 5011 is 1.5~6mm; the outer diameter of the second insulating sheet 5012 is 0.9-3.0mm.

[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 is understandable 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 is understandable 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 with a side length of 1.5~6mm; the second insulating sheet 5012 is a square insulating sheet with a side length of 0.9-3.0mm.

[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, etc. 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 understandable that the values ​​of the first and second insulating sheets should follow the principle of matching. 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, and 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, the second insulating sheet 5012 is provided with a first receiving groove 50121 on the side away from the receiving cavity 101. The first receiving groove 50121 is used to receive at least a portion of the first column 401. That is, the first receiving groove 50121 can receive a portion of the first column 401 or it can receive all of the first column 401. In other words, the depth of the first receiving groove 50121 is less than or equal to the thickness of the first column 401.

[0068] The wall of the first receiving groove 50121 is interference-fitted with the first column 401; By interfering with the groove wall of the first receiving groove 50121 and the second column 402, the inner peripheral wall of the first receiving groove 50121 abuts against the outer peripheral 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 misaligned in the first receiving groove 50121.

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

[0070] The wall of the second receiving groove 5021 is interference-fitted with the pressure ring 3; By interfering with the groove wall of the second receiving groove 5021 and the pressure ring 3, the inner peripheral wall of the second receiving groove 5021 abuts against the outer peripheral wall of the pressure ring 3, so that the second receiving groove 5021 can limit the pressure ring 3 and prevent the pressure ring 3 from being misaligned in the first receiving groove 50121.

[0071] In some embodiments, the first receiving groove 50121 is used to receive at least a portion of the pressure ring 3, that is, the first receiving groove 50121 can receive a portion of the pressure ring 3 or all of the pressure ring 3, that is, the depth of the first receiving groove 50121 is less than or equal to the pressure ring 3.

[0072] The wall of the first receiving groove 50121 is interference-fitted with the pressure ring 3.

[0073] By interfering with the groove wall of the first receiving groove 50121 and the pressure ring 3, the inner peripheral wall of the first receiving groove 50121 abuts against the outer peripheral wall of the pressure ring 3, so that the first receiving groove 50121 can limit the pressure ring 3 and prevent the pressure ring 3 from being misaligned in the first receiving groove 50121.

[0074] Correspondingly, the second receiving groove 5021 is used to receive at least a portion of the second column 402, that is, the second receiving groove 5021 can receive a portion of the second column 402 or all of the second column 402, and the depth of the first receiving groove 50121 is less than or equal to the thickness of the second column 402.

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

[0076] By interfering with the second column 402 through the wall of the second receiving groove 5021, the inner peripheral wall of the second receiving groove 5021 abuts against the outer peripheral wall of the second column 402, so that the second receiving groove 5021 can limit the second column 402 and prevent the second column 402 from being misaligned in the first receiving groove 50121.

[0077] In some embodiments, the sealing gasket 502 is a circular gasket with an outer diameter of 1.5~6mm; 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 with a diameter of 1.5~5mm; 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 pressure ring 3 is a circular ring with an outer diameter of 1.5~5mm.

[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 with a side length of 1.5~6mm; 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 column is square, and the side length of the cross-section of the second column is 1.5~6mm; 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 understandable that the values ​​of the gasket, pressure ring, and second column should follow the principle of compatibility. For example, when the outer diameter of the gasket is relatively small, the outer diameter of the pressure ring should also be relatively small, and when the outer diameter of the gasket is relatively large, the outer diameter of the pressure ring should also be relatively large.

[0086] In some embodiments, the sealing gasket 502 is provided with a spacer 6, which is spaced between the second column 402 and the bottom of the receiving cavity 101; and the spacer 6 has a protective portion extending out of the end of the second column 402 away from the second column 402, which is used to be spaced between the tab of the second column 402 and the bottom of the receiving cavity 101.

[0087] In this embodiment, the housing assembly 100, by providing the isolator 6, can prevent the second column 402 from contacting the bottom of the receiving cavity 101, and can also prevent the tabs on the battery cell connected to the second column 402 from contacting the bottom of the receiving cavity 101. In other words, it can prevent the second column 402 and the tabs connected to the second column 402 from contacting the housing 1, thus preventing the battery from short-circuiting and improving the safety performance of the battery.

[0088] In some embodiments, the isolation member 6 is disposed on the side of the sealing gasket 502 near the bottom of the receiving cavity 101; the isolation member 6 includes an isolation portion 601 and a connecting portion 602, the isolation portion 601 being spaced apart from the bottom of the receiving cavity 101; the projection of the second column 402 in the direction of the isolation portion 601 is located on the isolation portion 601, and a gap is formed between it and the end of the isolation portion 601 away from the through hole 2; a protective portion is disposed on the isolation portion 601; The connecting part 602 is located at one end of the isolation part 601 near the through hole 2, and the connecting part 602 is fixedly connected to the sealing gasket 502.

[0089] It is understandable that the separator 6 has a simple structure, simplifies processing, and ensures the reliability of the spacing between the second column 402, the tab, and the housing 1, thus preventing the tab from contacting the housing and causing a short circuit in the battery.

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

[0091] The housing assembly of this invention includes a housing, a pole post, and an insulating sealing structure.

[0092] The housing 1 has a receiving cavity 101; the pole post 4 includes a first post 401, a second post 402 and a third post 403, the first post 401 is located outside the receiving cavity 101, the second post 402 is located inside the receiving cavity 101, the third post 403 passes through the housing 1 and connects the first post 401 and the second post 402; the insulating sealing structure 5 is disposed between the third post 403 and the housing 1, between the first post 401 and the housing 1, and between the second post 402 and the housing 1; the insulating sealing structure 5 is interference-fitted with the outer peripheral surface of the third post 403; the projection of the outer edge of the second post 402 in the direction of the insulating sealing structure 5 is located on the insulating sealing structure 5, and the distance between the second post 402 and the outer edge of the insulating sealing structure 5 is 0mm.

[0093] The housing assembly 100 also includes a pressure ring 3, which is disposed 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. The projection of the outer edge of the pressure ring 3 onto the insulating sealing structure 5 is located on the insulating sealing structure 5, and the distance between the pressure ring 3 and the outer edge of the insulating sealing structure 5 is 0mm.

[0094] By setting the outer edge of the second column 402 and the outer edge of the pressure ring 3 to be flush with the outer edge of the insulating sealing structure 5, it is possible to improve the sealing and insulation performance between the pole and the housing 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 housing 1 and the second column 402, one end face of the insulating gasket 501 in the thickness direction abuts against the sealing gasket 502, and the other end face of the insulating gasket 501 in the thickness direction abuts against the pressure ring 3.

[0096] The insulating pad 501 includes a first insulating sheet 5011 and a second insulating sheet 5012 connected together. The first insulating sheet 5011 is disposed between the outer periphery of the third column 403 and the housing 1. The second insulating sheet 5012 is disposed on the side of the housing 1 away from the receiving cavity 101 and abuts against the housing 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 first insulating sheet 5011 and the outer edge of the second insulating sheet 5012 is 0.3 mm.

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

[0098] The first receiving groove 50121 is used to receive at least part of the pressure ring 3, and the groove wall of the first receiving groove 50121 is interference-fitted with the pressure ring 3.

[0099] The sealing gasket 502 has a second receiving groove 5021 on the side facing the receiving cavity 101. The second receiving groove 5021 is used to receive at least part of the second column 402, and the groove wall of the second receiving groove 5021 is interference-fitted with the second column 402.

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

[0101] By making 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 the same, it is possible to improve the sealing and insulation performance between the pole and the housing without increasing the volume of the pole and the insulating sealing structure.

[0102] The sealing gasket 502 is provided with an isolation member 6, which is spaced between the second column 402 and the bottom of the receiving cavity 101; and the isolation member 6 has a protective part extending out of the end of the second column 402 away from the second column 402, which is used to be spaced between the tab of the second column 402 and the bottom of the receiving cavity 101.

[0103] The isolation element 6 is located on the side of the sealing gasket 502 near the bottom of the receiving cavity 101; The isolation member 6 includes an isolation part 601 and a connecting part 602. The isolation part 601 is spaced apart from the bottom of the receiving cavity 101. The projection of the second column 402 in the direction of the isolation part 601 is located on the isolation part 601, and a gap is formed between it and the end of the isolation part 601 away from the through hole 2. A protective part is provided on the isolation part 601. The connecting part 602 is located at one end of the isolation part 601 near the through hole 2, and the connecting part 602 is fixedly connected to the sealing gasket 502.

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

[0105] The sealing gasket 502 is made of at least one of PFA, fluororubber, and PPS. When the elongation, yield elongation, yield strength, and elastic modulus of the material are relatively large, the compression is 20%~40%. PFA, fluororubber, and PPS have good corrosion resistance and high temperature resistance. When the temperature rise is high during laser welding of the shell and the top cover, PFA, fluororubber, and PPS will not soften or melt and affect the sealing performance.

[0106] The present invention also provides a battery.

[0107] The battery of this invention includes the housing assembly 100 of the above embodiments.

[0108] By providing the housing assembly 100 of the above embodiment, the energy density of the battery in this invention can be improved.

[0109] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A housing assembly, characterized in that, include: The housing (1) has a receiving cavity (101). The pole (4) includes a first pole (401), a second pole (402) and a third pole (403). The first pole (401) is located outside the receiving cavity (101), the second pole (402) is located inside the receiving cavity (101), and the third pole (403) is inserted into the through hole (104) of the housing (1) and the third pole (403) connects the first pole (401) and the second pole (402). An insulating sealing structure (5) is disposed between the third column (403) and the housing (1), 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-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 second column (402) and the outer edge of the insulating sealing structure (5) is 0~0.5mm; The insulating sealing structure (5) includes a sealing gasket (502); The sealing gasket (502) is provided with a spacer (6), which is spaced between the second column (402) and the bottom of the receiving cavity (101); and the spacer (6) has a protective part extending out of the end of the second column (402) away from the second column (402), which is used to be spaced between the tab of the second column (402) and the bottom of the receiving cavity (101); The isolation element (6) is located on the side of the sealing gasket (502) near the bottom of the receiving cavity (101); The isolation member (6) includes an isolation portion (601) and a connecting portion (602). The isolation portion (601) is spaced apart from the bottom of the receiving cavity (101). The projection of the second column (402) in the direction of the isolation portion (601) is located on the isolation portion (601), and a gap is formed between it and the end of the isolation portion (601) away from the through hole (104). The protective portion is provided on the isolation portion (601). The connecting part (602) is disposed at one end of the isolation part (601) near the through hole (104), and the connecting part (602) is fixedly connected to the sealing gasket (502).

2. The housing assembly according to claim 1, characterized in that, The housing assembly (100) also includes a pressure ring (3). The pressure ring (3) is disposed 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); or The pressure ring (3) is disposed 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); 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 pressure ring (3) and the outer edge of the insulating sealing structure (5) is 0~0.5mm.

3. The housing assembly according to claim 2, characterized in that, The insulating sealing structure (5) also includes an insulating gasket (501). When the pressure ring (3) is disposed 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 its thickness direction abuts against the sealing gasket (502), and the other end face of the insulating gasket (501) in its thickness direction abuts against the pressure ring (3); or, When the pressure ring (3) is located between the second column (402) and the insulating sealing structure (5), the sealing gasket (502) is located between the housing (1) and the pressure ring (3), and the insulating gasket (501) abuts against the sealing gasket (502) at one end face in its thickness direction, and the insulating gasket (501) abuts against the first column (401) at the other end face in its thickness direction.

4. The housing assembly according to claim 3, characterized in that, The insulating pad (501) is made of at least one of PPS, PP, PET and PBT.

5. The housing assembly according to claim 3, characterized in that, The sealing gasket (502) is made of at least one of PFA, fluororubber and PPS soft material.

6. The housing assembly according to claim 3, characterized in that, The insulating pad (501) includes a first insulating sheet (5011) and a second insulating sheet (5012) connected together. The first insulating sheet (5011) is disposed between the outer periphery of the third column (403) and the housing (1); The second insulating sheet (5012) is disposed on the side of the housing (1) away from the receiving cavity (101), and the second insulating sheet (5012) abuts against the housing (1); The projection of the outer edge of the first insulating sheet (5011) onto the second insulating sheet (5012) is located on the second insulating sheet (5012), and the distance between the first insulating sheet (5011) and the outer edge of the second insulating sheet (5012) is 0.3~1.5mm.

7. The housing assembly according to claim 6, characterized in that, The first insulating sheet (5011) is a circular insulating sheet with an outer diameter of 1.5~6mm; the second insulating sheet (5012) is a circular insulating sheet with an outer diameter of 0.9-3.0mm, or The first insulating sheet (5011) is a square insulating sheet with a side length of 1.5~6mm; the second insulating sheet (5012) is a square insulating sheet with a side length of 0.9-3.0mm.

8. The housing assembly according to claim 6, characterized in that, The first insulating sheet (5011) has a first receiving groove (50121) on the side away from the receiving cavity (101). The first receiving groove (50121) is used to receive at least a portion of the first column (401), and the groove wall of the first receiving groove (50121) is interference-fitted with the first column (401); or The first receiving groove (50121) is used to receive at least a portion of the pressure ring (3), and the groove wall of the first receiving groove (50121) is interference-fitted with the pressure ring (3).

9. The housing assembly according to claim 3, characterized in that, The sealing gasket (502) has a second receiving groove (5021) on the side facing the receiving cavity (101). The second receiving groove (5021) is used to receive at least a portion of the pressure ring (3), and the groove wall of the second receiving groove (5021) is interference-fitted with the pressure ring (3); or The second receiving groove (5021) is used to receive at least a portion of the second column (402), and the groove wall of the second receiving groove (5021) is interference-fitted with the second column (402).

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

11. A battery, characterized in that, Includes the housing assembly (100) as described in any one of claims 1-10.

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